@Rick - thanks for sending the file through e-mail.

So just so others see this as well the slowdown issue is trying to use QuickTrim directly on your model with 3296 curves.

That will do the equivalent of using the regular Trim command and selecting all 3296 curves as both the objects to be cut and also as the cutting objects.

To solve this you'll need to narrow down the number of candidates that QuickTrim will be trying to process.

You can do that either by hiding curves outside of a current active working area of say a few hundred curves or by selecting curves in a particular area. If you have some selected curves the cutting up processing will only happen on that selection.

Maybe someday I can work on this to make a large several thousand candidate pool work better but that won't be anytime soon. To use it effectively you will need to narrow it down to something like 2 or 3 hundred curves or ideally even less rather than several thousand all being active on the same operation.

Thanks, - Michael