I'm not going to say anything bad about somebody who loves Frank Zappa's music so much as to put this much work into learning some of it.

Me, myself, personally, know better than to even try it.
I loved the rendition. I enjoyed the uke work, and I also like the look of that uke itself even though I see just the fretboard and part of the headstock.

I am not familiar with the work, but I can tell you put time, effort, and passion into what you played. I loved all the technical parts of it. Keep on rocking and doing well.