LOL that jackshaft mount looks kinda familar. Much more refined than mine turned out. I didn't know if this drive method would work out good or not, and I didn't want to chance wasting time making an unproven device that was real pretty but didn't work so well, so I used whatever was laying around that was easy to git 'er dun, and didn't worry about cosmetics so much.
If you used that with a belt clutch, you would be amazed at how much less vibration and noise and maintenance and oil mess there is. I don't think I will ever use an open chain primary on a build again.
I've grown fond of using a belt secondary too. Besides the smooth and clean quietness, it is so easy, with no tools or rags needed, to walk the secondary belt off the wheel pully for completly dragless drivetrain for pedaling if you want or need to.
I like the CVT drives, they make a lotta sense. I gotta do one of those soon. Got some ideas about building my own CVT with a large enough driven pulley to get a bike useable ratio and driveline offset without the need of an additional jackshaft.