-
Changing thread pitch is easy
It is, but on a worm drive it tends to make your problems worse rather than better because the depth of engagement is proportional to the pitch. The engagement on the band is the weak point, as anybody who has stripped out a Jubilee clip can tell you. Making the contact area smaller and then trying to increase the tension seems like a recipe for disaster.
I see.
It would be cool if someone were to adress these points in a nicer product. Changing thread pitch is easy, but I can’t imagine how it would be possible to improve thread engagement. Adapting to different seat tube diameters would be easy though.