Hi all,

Hope things are well in the forum :-)

I post now because I have a challenge that I can't fathom with a model I'm making (attached). I'm trying to subtract the square box from the bottom of the model so as to remove the conical rods that protrude below the the bottom surface level of the model. As you can see most of the surplus part of the conical rods have been removed but the last ones ... doesn't seem to want to go away ...

I've tried to cut away the conical rod ends with a box and a cylinder (boolean - difference - main model as base object and the box as item to subtract) of various sizes but either nothing happens or the box unions with the rest of the model. Which surprises me because I was able to cut off the first rods, although when I tried to use a box that spanned all of the bottom surface it didn't work either.

I need the bottom surface of the model to be absolutely flat - would one of know what goes amiss and how to cut the last of the conical rods?

Help is appreciated :-)

Jesper