Alternate grapple starter

[NED]

I'll explain my system, please say me if it's possible before I start working on "BACK GRAB STARTER"

GRAB-(regular grab starter)
-grabattack
-grabattack2
-grabdown (launcher)
-grabbackward (slam)
-grabforward (alt slam)

-->cancel to back grab starter

BACK GRAB-(grab starter on the back of enemy)
-NEW grabattack
-NEW grabattack2
-NEW grabdown (ground move)
-NEW grabbackward (slam)
-NEW grabforward (alt slam)

I would like to use this this system inspired by what you can see in SOR.
This way you can use german suplex, back strangle, and other back moves.