Hes not too bad, hell if he can fix Andrews car!!!
I wasnt sure he could do wolf, but that confirms that he can. At least give the guy a ring. Techincally tho, all of the systems are much of a muchness, if hes good at one, hes going to be good at another, its just if there is a problem somewhere is when things get slightly trickyer trying to find out what special feature to use to fix the problem.
With the popularity thingy tho, the wolf V3 wasnt so popular, now the V4 is out they seem to be doing a lot better, especially as they now have the plug in (like pfc) version, it seems its a really big insentive, really it means no one can bugger up the wiring, unless it was already like that.