For some odd reason i got it all the work, all models are fine everything works as far as i can see but my engy's cant build. The moment they are in spawn they can still select what they want like a dispensor. The moment the spawn "opens" and they want to select a dispensor or sentry it wont allow them to select it.
p.s. i believe your tip to use the amplifier should work normally but as far as i can see it "clashes" with
http://forums.alliedmods.net/showthread.php?p=737572 , not that i need that for saxton but forgot to remove it.. you never know if its handy to know ;)