> Michael: Would it be possible to have some kind of indicator of what the
> largest possible fillet value for a given operation is?

Unfortunately it is quite difficult to calculate this value... It would be a pretty intense calculation, difficult to achieve, and even if achieved probably very time consuming.

- Michael

I kind of figured that would be the case. It's not a big deal, just one of those things you think of when annoyed. haha

OK, Thank's Black Mariah, that answered my first question :o)

As for the other thing, I include mouse.3dm.

While I'm here, I seem to have found another anomoly. I'm getting an error in this sweep (Example2.jpg) but only when I select the outer rail first. It appears to conform to the curves when I select in the opposite order. Maintain height is switched on, the effects are greater without. For this, I attach Mouse2.3dm.