Hi... ive been having issues with the Hornby S2290 brass gear, i have a small g-clamp but the issue is that it has a swivel head, and i have never used these clamps before, im a complete newbie when it comes to using these things, should i use a clamp or just resort to using a small vice? if so, how do i properly use one of these with a swivel head or a vice to fit the brass gear?