Tonyeltigresa wrote

Thanks for the detailed reply!

I wont pretend to understand all of it, but I'm sure that at some point it will  be of use to someone who does.

I've no idea how typical my own requirements are, but I'd imagine the geometry I'm trying to draw is somewhat common. It would be great if snap to intersection worked reliably with inscribed ellipses because it's really the only bug I've encountered that has a material impact on the programs usability.

I'll try the workaround and report back.