Neil, obviously never built an old school Pred ... the mouldings were all shocking!!!
The list went as follows;
1) clock out and mill chassis in gearbox sealing surface areas so that they were flat (never saw a flat one from the factory) and had the correct closed profile to hold the bearings without compressing them (usually they were lose on one side, sloppy on the other and sloppy on the pinion.
2) same as above but to the gearbox tops
3) epoxy the holes for the front shock mounts and both front and rear hinge pins then redrill so they were parallel and in the correct positions (changing base geometry at the rear and allowing some antisquat adjustment too)
4) Helicoil ALL screw holes as some where always oversize before you even cut the first thread
5) "gap" the inboard hinge pin area of the wishbones, sometimes you had to epoxy and line bore the holes (I normally used a slightly thicker pin too as you were modifying every piece anyway).
That took a while to get that right and usually I would do 5-10 sets of everything, there were always plenty of pred people who wanted a sorted car
Thankfully with the Kyosho stuff the most that is ever required is the occassional de-flash to get perfect fit .... even then it's probably me being over sensitive .. Kyosho quality makes everything else look unfinished IMHO.