Thank you all for the kind comments. There has been quite a bit of evolution in hte process of building and refining these ukes. I have no musical background whatsoever, and only started music lessons after building the first of these instruments. That said, I think that the sounds that they produce despite my limited playing ability is quite good, and improving with iterations.
Uke #1 (first picture, cedar top) think is only accidentally playable - it has a very tinny tone and a strange reverberation when the C string is played - I built this with no research whatsoever, and have some very odd supporting structures internally, which necessitated the off center sound hole. Additionally, without knowing better, I placed the bridge at the very edge of the gourd, and get very little vibration out of the sound board.
Uke #2 (first picture, spruce top), improved dramatically from the first, this was a bit rushed and sloppy, but is very playable. Also strung with a wound low G string.
Uke #3 (long body) sounds very rich and mellow - likely due to the much longer resonant top
Uke #4 (koa top soprano) as a soprano, is pitched higher than some of the others. I think the bridge and sound hole placement is close to correct, and sounds much richer than #1
Uke #5 (round body with C holes) - just finished this one, and strings are still settling in. Sounds a bit more balanced than #3, but not as loud? Very nice to play
Using the gourd bodies makes each build a unique challenge - I can't control the body shape, so its best guess for component placement. The most exciting part is to string it up and hear its voice for the first time.
Thank you for your suggestions in particular, Black Bear. Can you provide some guidance for sound hole placement and bridge dimension? I've primarily been using off the shelf parts, although uke #5's bridge was built from scratch.
I'll be happy to share the build sequence and suppliers in a later post, Greescoe and Hal.