All

Interesting. This affects all chain drives, apparently, but the effect would become more pronounced in VECTr at higher settings (than in a continuous chainrings) as the space between gear segments increases, bur then for only for a fraction of each crank rotation. Lower settings (35t/30t) it seems virtually the same as continuous chainrings. I suppose it will come down to...

I have not heard of the polygon effect. I take it that it is a bad thing. Why is it bad?

No,

Here's an update to my invention featured back in 2014: In January, patent no. 10,167,055 was issued for VECTr - Variably Expanding Chain Transmission Here's a video of it on a Trek bike in the lab: https://youtu.be/9Q8RavDigzo And here's one of it on the road: https://youtu.be/5jBXFftKy6U