I'll also mention that, while I'm still learning how to start the .20 FP on the airframe, hand-starting it takes a LOT of prime to get it to fire off w/muffler pressure on the Hayes tank.
That may be normal for the set-up tho'.
Hand starting on the bench was easy w/a regular vent tank.
I don;t have the inboard tank setup, but I have always found any of these engines absurdly easy to start. Almost uncanny when it comes to starting after hanging on the wall for years. Fly it, hang it up, no after-run oil, wait 5 years. Choke by pulling through 4-5 times with my thumb over the hole, aerate until it start to get a little less gummy, and flip *forward*, off it goes.
The one complaint I might have about the rear-needle versions is that the fuel tends to run out of the feed line between the needle and the spraybar more than with a front-needle system. You can see it happen, and the tendency is to start, then go lean and quit, before it sucks enough fuel to keep going. The solution is to get it ready to go, then pull one choke, and flip immediately. Or the old "hot 40VF" trick of flipping with a partial choke with your thumb.
There is a definite feel you need to get before it will go, and that is a matter of experience. You have to get enough fuel in it to loosen it up, and aerate it well enough to get a mixture that will fire. That's a skill to learn.
Brett