Mid NCR after getting knocked out of the tourney I came up with the following setup:
cr.A (whiff), df.D, hcf+BCD, then
on hit qcf+C, explosion super, etc. etc.
on block cr.B, cr.A, then
on hit qcf+C etc. etc.
on block (f+A), hcf+BD etc. etc
The on hit follow up is fairly self explanatory, the on block is what's important. hcf+BD is +1 on block, cr.B is 4 frames start up, so a three frame trap which goes back into itself as a guard crush string (without f+A it's not a true guard string but sometimes the pushback is too far for it to connect). Also the whiff cr.A at the beginning is to make sure the slide doesn't knock down.