As a dedicated fan of Campagnolo I was really disappointed to realize that removing Power Torque cranks can be a real problem. I see no point of designing two incompatibly cranks but to get extra money from the customers.
If one has to deinstall PT cranks one has to use a tool which is ridiculously expensive (100--150 EUR). The bike shop which services my bike refused to buy it and I do not blame them. They service three Campagnolo bikes (two of them Ultra Torque).
Fortunately for me they managed to get a tool using their contacts with CCC cycling team. (BTW CCC do not ride Campagnolo any more but they did in the past).
The tool in question is depicted below (it is the cheapest tool as far as I know):
The tool is so uncomplicated that it seems not particularly difficult to make a homemade copy. That's why Campagnolo do not sell it on their own?