HiimjoshUltimate, yes. Professional, no (aka, as long as it is ctrl, winkey, alt, space, alt, winkey, fn, ctrl) you're fine. If you have the one with 4 keys on the left of the spacebar it will not fit.
rampantandroidAwesome. No i have the Ultimate S. Just thought its time to get a new key caps, cause... pbt. :P
Does anyone know how hard/easy it is dealing with stabilizers.
HiimjoshSo, I have the professional and not the ultimate (ugh. Buy new keycaps? Nope. Not standard bottom row) so my experience may not be the same but in case it helps:
On mine, the spacebar uses Cherry stabilizers - super super simple to deal with. The 4 other keys use costar wires/inserts. On all but one it wasn't TOO hard to handle: remove key from switch, use pliers to carefully remove the wire from one insert, slide off other insert. Then just move the inserts over to the new keys and put the stabilized keys on before any others: slide one side onto the wire, use the pliers to put the other side onto the wire by bending the wire gently, push keycap onto switch.
The bad key (backspace) I was unable to remove the inserts from it - they're stuck pretty well. It might be worthwhile for you to go on to WASD keyboards and buy some extra costar inserts.
Thanks :)