Not quite a pinweel is it? Pinweel would compare to a heli doing a 360 stall turn or a 540 right?

But the knife edge loop can be done in a similar fashion on a lot of planes that struggle to go past the 270 to 360 quick enough. I've also found that all my planes that can do it does it differently. Some like when you go through at half power and some more. Different tricks with every bird except if you are flying something like a huge pattern or large scale I think it might be different. Smaller planes get very twitchy sometimes in the last bit. O and remember to for the first stretch out the upward leg from entry to get some safe height up the top. You come down much faster than you go up

This was speaking from mostly profile planes I have flown and am sure that it is not all directly related to your plane. Hope I was able to help. Oh and be sure of one thing, be wide awake on the aileron and elevator. I've been caught out a couple of times. One more thing! Make sure your plane is flutter proof. Throttle on the down leg can never be a good idea in my opinion. If anyone cares to correct me please do? I am also just learning.