You should use the "bic" tag in your thing instead.

That's amazing, dude. Congratulations !!!!

Please put the link: http://www.thingiverse.com/thi... than other people will understand the BIC POSTS. Thanks a lot.

Cool,

It looks like there may be area beyond the tip of the pen (once inserted) that may be eliminated so this will fit onto the TOM. Sadly I have other projects including improving CAD skills so I do not have the opportunity to investigate further.