I have a KS canister on a DL50 with a flex header from Tom. I dont think I gained any real impressive rpm numbers by switching to a can, but two big things I did notice was 1) much much quieter setup with a sweeter sound. 2) very impressive throttle response.

I had a 24x8 menz prop on the DL which use to spool up really slow ( I just used this prop for testing), When I added the canister the response from idle to full was almost instant. Know when I perform rolling harriers really low down and Im banging on the throttle stick, the instant punch I know get sends a quick blast of air over the control surfaces. Mid range is also much smoother and seems to have eliminated any mid range gurgle I once had.