Trying to remove feature

[josh.au.love]

I'm trying to remove this triangle area where the three legs of my cube meet. I've can't get the "hole" feature to align properly and that seems like it would be the messiest way to do it. Chamfer give the error below, attempting to follow the directions and doing it in single operations doesn't work either. If I select all the faces and delete it extends the vertex's out and there's little nipples coming out of the backside of the body. Please help 😞

[jeff_strater]

please share the model here.  I'm surprised that delete doesn't work - that's how I would approach it at first.  Could be some combination of Split Body, or some cut operation to get rid of that geometry.

[josh.au.love]

added .f3d file

[jhackney1972]

I think I got them all.  Use Delete and then you have to select all 48 faces and do it all at once.  If you try to do it as groups, it will do one and then fail on the next.  Check behind me.  Model is attached.

[josh.au.love]

The problem with this is you end up with these protrusions sticking out of the oject

[josh.au.love]

and interestingly enough it deletes part of the model at the top

[jhackney1972]

I can understand the removal of some material around the hole.  You hole penetrated the material you wanted to remove so this had to occur.  The small protrusions out of couple of the corners, I have no idea at this time.  I will work at it a little more. 

[jhackney1972]

Take a look at this model, see if all those protrusions are gone.  

[josh.au.love]

I appreciate your efforts unfortunately the channels connecting the underside are a crucial part of the design. I'm fairly green with parametric modeling so this probably could have been modeled in a more efficient way where those triangles didn't exist in the first place but i'll just have to keep working on it or start over lol.

Thank you very much for your efforts John