I have a full set mated to v2/4 callipers which are too much brake for my xc plans. I bought some replacement x2 callipers and was going to do a swap but I've also ended up with a spare lever so thinking rather than swap things out, getting another lever will mean I can build up a set of brakes without having to take apart the working ones. I've got hoses etc, so just need the master cylinder and lever gubbins.