The only parts that will break will be the suspension bits, and these are interchangeable and updateable. Besides, you will probably want to switch to the newer upgrights and other bits after burning through a few sets of the 950 wheel bearings. The later TB03/416 uprights use a more durable 1050 bearing...

FYI: The best 950 wheel bearings I've used are the TRF fluorine sealed ones. Don't ever clean or even try to dust them off (you will push dirt past the seal). Simply throw a new one in when you find one that's gone flat inside. rdvtg-hobbies on eBay sells them (part# 42112) for $5.30 a pair (plus $2/$1 shipping)