Gerry, They probably are neck through. I found that comment about the neck attachment on a different site that I didn’t bookmark. I’ll look for it again. I assumed they were all like that but I am probably wrong (not the first time). I only had one picture to use and it didn’t show the spike end, wish I had seen the photos you sited. In the end it worked out well even using the drawer pull to attach the neo.
As for why I built a gottan, I was looking for something not too complicated to build for the challenge that would give me some new building experiences and that I could make as inexpensively as possible. Also my daughter had asked if I could make something for her friend Yuki’s graduation/birthday. She is from Kyoto and was a music major, so I checked out sites about stringed instruments from around the world and thought a Japanese instrument looked do-able. A little more research and I found this site. Then I found a used copy of Kyle’s book on Amazon and I was off.
Kyle, the azuma sawari took a little tinkering to get the buzz right, with out causing the string to go sharp. I’ve made a few sitar bridges for electric guitars (similar to the Danelectro electric sitar) so I kinda knew what I had to do to get a good buzz (no pun intended).
The bachi I made did have a bit of flex at the tips. The slice of myrtle I used was only 1/16" thick and I sanded the playing edge down to about the thickness of a heavy guitar pick.