The helicoil site model is of even more limited value. How do you want your helicoils? As installed (and without tang) or as purchased? Actually, these are'nt the worst case. Its stuff like PEMserts that actually alter the part they are inserted into which are a problem. All sorts of graphics fun it you let them interfere!!!
I was - and he did. So at least I didn't get coal.....
OK, OK, It's a reference to my holiday sig. "Be naughty - Save Santa a trip..."