When I get a chance I will take a picture of the spacer, but I will answer your other questions real quick.....if I can. Mine also seems to have low compression, I choke the engine until I have gas running out the carb, I use a starter. I have flip started it before but its not reliable. I have a buddy that converted a Honda GX31 (very simular motors) and his will flipstart using electronic ignition so I am sure this would to if I wanted to spend the money on EI. I flew the Aeronca again today, flew great at 18lb (I re weighed it after adding tail weight, cowl, etc). Plenty of power and lifts off the ground pretty quick. It flies very very scale (but not underpowered) and sounds awesome.

David