Blagard-01

Just turn the powerbase around. Feed the power cables under the track, that is the only down side. I would suggest reinstalling the app on your iphone7, but just in case you overlooked it, make sure your iphone "bluetooth" is turned on.

Barry it does not need to be mirrored, that was my bad, so long as each is cross wired it will be OK. Another post will appear later as I used a word that needs moderating to describe what I did! - apparantly the word was a profanity - so kind to myself!

Definately two pieces of track and look carefully as the wiring is mirrored so each one is different. once the wiring is done they can be fitted either way around but the important thing is the top rail is diverted to the bottom rail then through the powerbase and then back up again. The bottom rail ir the reverseof course.

New image uploaded for above post - it will appear after going through the admin process.

So Dr_C the diagram below will also work DIGITAL ONLY without any of the limitations. For Analogue when the modified quarters are replaced all limitations on layout apply. Note that the wiring to cross the dead spots is not the same on each quarter, one must be the mirror reversal of the other. /media/tinymce_upload/9f4a42ff2e3b2c89715d22e7d69c22b8.jpg

The power supply may be managed in a different way to what you think. A single lane should be able to power 6 cars in one lane with both power adapters connected. So in digital mode the power must be combined and not separate

To summerise what may be the neatest way. Isolate the lane on the exit by snipping the ribbon as yellow line. Introduce a dead spot as the blacked bit of rail. Solder a wire to maintain rail continuity as the red link /media/tinymce_upload/968c109a613d0f1bb56ee284d8e0725b.jpg

It seems to me C would work. although Dr_C explanation could be clearer so a sketch below shows what he is saying. Use modified 1/4 ers for Digital and unmodified for Analogue. However please note Analogue still requires all other limitations to apply. /media/tinymce_upload/53c8388cb67347d7e0e090fdbf332cbf.jpg

First of all there is a limit on the number of images you can upload in a single post so I combined mine in "Paint" to make one image. Then you write your post and upload you image using the icon as image below /media/tinymce_upload/867f85c04b8f24a849c5ec39f71e1648.jpg

I'll jump in and say you may not have understood what Gorp said. By attaching the single lane of the pit entry and exit pieces either side of the power base you only use one lane of the power base and therefore cannot create any problem of electrically connecting Lanes 1 and 2 on the power base. One power base lane is never used! - That as he has made very clear works for Digital only. Analogue would need both lanes of the powerbase so cannot be used at all in this arrangement And yes it is a fix for digital circuits where the curved lane changer is used. In does in fact remove all the limitations that would normally apply to ARC Pro compared to the C7042 APB.

The two transformers for more than 3 cars will be fine. What you will need is booster cables to put the power into the track directly at some distance away from the base. This helps overcome the drop in voltage due to the track to track connections not always being perfect and keeping the voltage up all the way around. Very simple to do as you connect one end of a cable to the track by the powerbase and the other end to the same lane further around the track. Repeat for lane 2. If necessary do even more cables so you could have say 2 pairs with each a third of the way around the circuit e.g. http://www.jadlamracingmodels.com/scalextric-c8248-sport-track-power-booster-cable-2x https://www.scalextric.com/uk-en/track-power-booster-cables.html

Scalextric will always have power supplies but may be out of stock from time to time. There are a number of 15V 4A power supplies by Hornby incl P9300 , P9301, C7024. I have no idea how different they are but they have have the same connectors and they all have been used with C7042 Digital APB. So if ARC Pro requires a specific transformer it should say so as those earlier ones are going to get used by people upgrading to ARC Pro unless told they shouldn't!

I doubt any version of Fire will go back to earlier bluetooth versions but I do recall looking up the specs somewhere like this table https://en.wikipedia.org/wiki/Fire_HD So bluetooth is OK back to 3rd Generation but I am not so sure about the OS at that time. The hardware itself has an impact so even with the correct OS and bluetooth there is no guarantee it will work. I would say there is an excellent chance of it working with Fire 7

Because you need two when running more than 3 cars

I don't think a table under this topic would help as the options of A and C take in a much broader scope of change than just the curved lane changers. Option B the modification to the curved lane changer as originally started in the thread with acknowledgement of moving the the dead spot to one rail oppersite the exit flipper is the only option giving use of curved lane changers with the ARC Pro powerbase in Analogue or Digital mode at the flick of the switch on the powerbase. And will work in all other situations being backwards compatible. (note the ribbon snip in Option B is different to the orignal analogue snip for C7042) Option A will void the warranty on the powerbase and render it Digital only due to reversed Analogue power on one lane. It will allow the powerbase to have the same Digital capability as C7042 (Analogue rendered unusable) Option C will require replacement of a track sections to switch to analogue and the still require the original snip mod on the curved lane changers for analogue use (or better option B mod if you have not snipped the ribbons yet!). and will allow Digital capability as C7042 A and C remove the limitation of Digital track layouts as listed in https://www.scalextric.com/uk-en/forum/arc-pro-limitations-on-track-layouts/?p=1 A new thread should be started for the pros and cons of different modifications that will affect ARC Pro in a broader sense than just the curved lane changers.