I'm also impressed with the way Airfix have approached a link and length type of track with the Firefly and Tiger I kits, it's as near fool proof as you're likely to come across. Some Dragon armour kits come with hybrid 'flexible plastic' tracks. The plastic is soft enough to be bent and shaped around running gear, but firm enough to hold better detail than vinyl. Nowadays everybody seems to be opting for link and length in braille scale. The new Airfix 1/35 Cromwell kits come with vinyl and link and length, so you can choose whichever you prefer. Vinyl probably works better in the larger scale, but in my mind tracks moulded in hard plastic usually look better.
