ORIGINAL: GrumpyTom
The good thing about the Excalibur line of crossbows is that most parts are the same for each bow. Also with the parts which are different, if you swap them out with another, then your bow becomes that other model (200 lb exomag - standard riser changed to forward riser becomes Exommax, shooting rails are of different sizes, longer for more powerful bow. ect).
The stocks are all inter changable, the question would be could you get your hands onto a thumbhole stock so you can make the change. Also the limbs are the same for all newer bows.
Hope this helps.
Well, Tom, gotta disagree w/ you on this one. Until they brought out the Vortex and Equinox, you were correct. The new thumbhole stocks won't fit the other rails, only the ones that come w/ the two new bows. Gotta hand it to Bill, he'd rather sell new bows than new stocks, lol. I'm 99.9% sure I'm right on this, but would welcome a correction if you find different info than I have.