Roller v-blocks???

[Highpower]

Making them isn't the problem for me Darren. It's planning them.

Trying to figure out the correct diameter and spacing of the bearings to use for a given range of shaft sizes and center height in relation to the "V" makes my head hurt just thinking about it. Math is not my favorite subject......

I don't want to waste a lot of time fumbling around with trial and error.
I was just hoping to find something I could copy the dimensions from at least.