Yes a lot of WGP bodies made around then still had solid necks. They can be converted to clamping style with a bit of machining work, and using a Ego neck is a common mod. Easier to stick to later bodies.. WGP 05 prostock, Orracle, Black Magic etc. all have screw fit STO type necks. The vido wasn't me - it was the guy I sold it to at the Super Six D10 game. I'm very difficult to catch on film as I'm a bit of a pump ninja...I was looking at a 2003 ProStock body which sadly does not have a removable neck , I think I seen a video of you playing with the orange one ?
the third pic was one i bought as a present for my brother and hes used it since