here's my BUSA se5a...
Just a few thoughts for those building one:

I used a Saito 150.... barely enough power, not really enough to enjoy flying this one (cash in significant altitude at every turn)
Needed all kinds of nose weight with the Saito... I'd recommend a G-38 or similar for weight & power.
Build the tail light!! i used 3 sets of nyrods for the tail... Next time I'd do pull-pull for weight savings and less slop.

For the side panel stitching, this is what I did:
covered the plane with coverall & doped, then put a 1/4" wide stripe tape at the panel lines. Then painted the plane with latex.... now before clearcoat, I added a 1/16 black stripe tape over the center of the now-green painted 1/4 stripe tape. I used a toothpick and brass colored paint to make "grommets" where the stitches enter the fuse. Then I soaked lengths of twine with white glue to make them rigid, then cut to lengths & attached from grommet to grommet with RC-56 glue.
Not 100% scale for the purists, but a relatively easy way to add a lot of look.