You need a long bit and I would never try drilling from both sides and expect it to meet somewhere in the middle. I think your understanding of how it should be done is absolutely correct. I will be glad to send you a bit, if no one else has already done so, but I know that it will take quite a while to get there. Or, you can just order it from AS.
"There is a time for building and a time for FLYING, and the time for building has long since expired." See you in Mt. Vernon - 2005 - KR Gathering http://KRGathering.org See N64KR at http://KR-Builder.org - Then click on the pics Daniel R. Heath - Columbia, SC