The Brothers have. If you search around on the net, there is a lot of info available. I too have thought about doing the coversion. It is worth it, if you can find all the necessary parts and a good reliable mechanic to do the labor for a decent price, or you do it yourself.

Otherwise (if the labor is too high, or parts can't be obtained), then you might be better off trying to obtain a used GSX and giving up your GS-T.