I am sure I have posted this somewhere on this thread before.. But my D7 is pretty heavy due to some overkill and finishing techniques.. I have a Poulan 46 cc chainsaw engine ..it lugs a 22/8 pretty well and makes the plane fly nicely ... If I recall it actually landed better with the 22/8 than with the 20/8. I am going to experiment with some lead removal this year.. I think I am a little to positive on the cg, and would like a bit more flair on landings.. HOPEFULLY I get it right and not to tail heavy !