Well Hello there Tom... Yes.. I'm feeling pretty useful lately.. you stick guys know what I'm talkin' about..

... and having alot of fun doing this.. Its been way too long ago that I've delved into a box of balsa.
Thanks for checkin it out...
I started today with grooving out the elevators for the brass joiner rod.. it took a little time, as you don't want to hurry it.. its easy to split, or fracture the wood/structure if you apply to much pressure in the wrong place...
Pic #1. The joiner as it will be installed in the elevators. After getting the placement correct via center/center, and accurately marking location, I used blue tape(I mentioned I use that alot) to mark my depth on a 1/8" drill bit. I drilled it by hand(yes, just the bit in fingers) and again just slowly cut it in to the depth.
I drill alot by hand on balsa for a few reasons. One being, balsa is so soft I can get it done just grabbing a bit and doing it quicker then I can set up a drill. The biggest reason though, is its much more accurate, and you can feel more of what your doing. If the bit gets tight in the wood, simply wrap it with a scrap of sand-paper for grip.
Pic #2. The next step is grooving the leading edge of the elevator to accept the joiner. I prefer using a brass tube with the inside diameter sharpened. Just spin the tube on the tip of a sharp #11X-acto will get it sharp.
Pic #3. From there I slowly use the tube to SLOWLY cut into the edge of the inside elev. LE. With the tube just flush with the surface it leaves basically a perfectly cut crevis that is "not quite open to the top yet.
Go slowly though, as its easy to split at this point.
BEWARE: The edge of the sharpend tube can slice alot things! So be aware of the pressures you invoke on the assembly. Reasonable twisting with the tube with light pressure is much better than trying to force the tube through the wood. It will cut through definately and actually leave a perfect plug.
I'm forever aware though that if that tube slipped as I'm applying pressure, it could/would stab me in places I care to not even mention.. especially true with bigger tubes and apps.. which the same technique again works very well.
Pic #4. Shows a start and finish. The elev on the right has only been drilled. After cutting the groove as described above, I simply take my Xacto and shave out the rest of the groove.. using the tube a bit to shave the groove, and I've used the drill bit as a small grinder(by hand) to relieve the "bend" area in the elev so the joiner seats correctly.. so basically using the same tools to fine-tune the fit.
Pic #5. Seated decently, the wire is totally flush with the LE of the surface, and should mate nicely when the surface is beveled. I will double check it all in a bit.
Pic #6. Close enough for "Rock-n-Roll". The joiner is seated nicely. I've aligned the surfaces via twisting and tweaking the joiner for a perfectly straight edge, as well as surfaces aligned to each other.
I'll be back in a while with some more progress..