Not using enough cam lube on the new cam or not bedding it in correctly can lead to cam failure, also not using matching cams and lifters e.g. using a kent cam with shonky ford lifters and vice-versa can do cause failure.

Kent cams have the cvh26 cam which is the same profile as the original RS1600i cam, im currently rebuilding my engine with a Turbo Technics kit and have the cvh27 which is similar but peaks at higher rpm.

Kent cam also do solid lifters which are easier to adjust and much cheaper than the genuine ones, it'll run alot better on solids than hydraulics

As for the clutch alignment tool, i made one up using some old sockets, its a bit hard to explain really