Thanks for the input. I've just started working on a Bernie Ash "Supersonic". It has a big more sweep than the Swinger or Freedom 45 that are about the same era. My primary concern was whether I needed to get creative with the leadout adjuster, possibly moving it into the leading edge somewhat. As noted, this plane has a really, really long fuselage and the CG is noted on the plans as being very, very far aft. I was somewhat concerned about the hard angle you'd end up with if the bellcrank were mounted on the spar This would give you a 25% to 30% angle at the wing tip. Apart from drag on the leadout slider, it seems that without some trick leadout adjuster, you could end up with some control feel issues.
My first thought was to just move the bellcrank back in the wing to reduce the angle. Might be tough on bellcrank to flap geometry though. So, I'm trying to consider some options. One might be to raise the bellcrank relative to the flap horn and leadout position. This might allow the thing to be moved back in the wing, reducing the angle without messing up the bellcrank to flap horn geometry.
This project will be fun, but there are some issues to get around, I think. I could probably build it just as it is on the plans and it would fly fine, but I'm afraid that sooner rather than later, I would have problems with sawing into the leadout slider or having problems with control feel due to the drag on the slider. That and the CG were my primary issues.