Signed up for the forums as I started getting into Akira/Hayate and wanted to share something I've discovered about this potentially finger wrecking move. I've come to find from training with Akira, that as with Ryu's Izuna in older DOAs and Raijin with Hayate...you can cheat. XD
How? Do full circles, counter clockwise. Instead of doing that 236 P+K then 43 P+K, you can initiate the 236 P+K and just circle around back to 6 and P+K, circle again back to 6 and P, then circle again and P+K. The circles have to be done a bit quickly just as you would have cheating Izuna, but they work.
Hope this helps people out. I can now do it 90% of the time with a pad (analog stick or d-pad) because of that. As for the knee on a pad, I just switched hold and throw (made more sense for me anyway) and slide my finger across both quickly. For any SCV players out there, it's almost identical to doing a JF Twister with Alpha Pat.