hi andrew
we're all following your thread with interest and you seem to be cracking on at a blistering pace, at this rate you'll be driving her soon
if you're worried about the tracks then you could remove a link and inspect the pin for wear, a normal used pin would have a stepped wear pattern of maybe 10 thou or so but this is just my guestimation. another method which is actually the official way of track wear testing is to count the links, i don't know how many links a new t16 track has but there will be a figure of so 10 or so less when the track is deemed to be worn out. you'll have to get one of the other t16 guys to give you the correct figures but you can only use that method if the tracks are original and haven't been swapped around with different sections from other vehicles (my tracks are made up from all sorts so the pin is my only guide to track wear)
all the best
rick