It doesnt matter if its a new car or a 2nd hand car. Seems alot of problems you are having is not just cos you bought a 2nd hand car. If you did the same things to a new car, than the problems will still arise.
Since its my ex car, I can give you a few tips.
1) cvd pins falling out
yes, they can fall out, but a little love and attention can prevent it. The cvd's come pre-built from the factory, and I think they were not built the best.
Pins will fall out of every car if preventative maintenance is not carried out. I've had pins fall out from AE, kyosho, losi, and im sure your getting the pattern here. Here is what I do from now on:
make a flat spot on the pin with a grinder/dremel where the grub screw will sit. This allows the grub screw to seat in more securely preventing the pin from moving. Using liquid thread lock on the grub screw, and finish off with heatshrink around the whole outside, and no pin is coming out in a hurry! It also helps if you have slightly longer pins.
2) never had a slipper problem, you just have to hold a 2mm allen key
firmly in one of the slots when tightening the slipper. Most times I tighten the slipper when its out as its alot easier.
3) shimming the diff
Bmax's are not like any other shaft drive cars. They NEED to be shimmed tight, alot tighter compared to other shaft cars. Otherwise you will strip the bevel and drive gears. I stripped one in 1 race meeting due to me shimming according to what
I thought was correct. This is the reason why bmax's run hotter compared to other cars. They are shimmed tight. Get some 0.1mm shims. Only you will know how tight you can get away with over time.
Have fun, and im still thinking about getting the factory kit after all this
