Just bought a digital scale from my LHS so I can see how "fat" my Extra is.  I will put it on the scale tonight.  I am expecting it to be heavy due to overgluing and the fact that it feels heavy!  It is certainly heavier than my Hangar 9 Aresti which has the YS63 in it - but that plane has way more power than I need.    I am really just starting to fly simple aerobatics/pattern, definitely not 3D, so I just need something that has enough power for sport flying.  And if it doesn't then I will buy a bigger motor and put the 46AX in the SSE.

Last night I got the cowl screws installed and most of the tail wheel done - used a 4-40 blind nut similar to what you described.