If I remember correctly, my balance was right at the edge of the main spar as well. From that I
had my finger more toward the leading edge so in essence I probably moved the cg 1/8" forward.
I am running an OS 91 and had to put alot!!! of weight in the nose but she flew good (until I
landed and the d$@# retracts ripped out and took one half of the wing with it[
] ah well. Pretty
plane though, it was a joy building it.
SVX