I've been using a soldering gun and a fan venting out a window for years. Regular twist drill did not make neat and clean air holes. I Took your advise and just bought a UNIBIT at home depot for $17.00 (well worth it)it works great! neat clean holes with my cordless drill. Takes a little skill not to go too far with the bit but SO much easier. Just threw my old soldering gun in the garbage.I NEVER want to smell burning plastic again! Thanks again Mark.

