Hi Michael,

Thanks for confirming that there aren't any CAD programs that define fillet width in this way. That's sort of what I figured and was not suggesting that MoI be changed to do it like this. Just thought someone here on the forum might have a trick to avoid these troublesome mismatches when making appearance models. For most stuff I have to stick with constant radius fillets since anything involving variable radii is troublesome to machine.

Also, thanks for the peak into how filleting works. That's pretty interesting about how the rail is made.

- Peer