There are two bays back there that you need to get into. I made mine about 4 in diameter. When choosing the size of the hole, think about the area that will be needed to put a mounting plate back in. Don't cut yourself so close to the stringers that you don't have room to mount one.
See you in Mt. Vernon - 2005 - KR Gathering See N64KR at http://KR-Builder.org - Then click on the pics There is a time for building and a time for FLYING and the time for building has expired. Daniel R. Heath - Columbia, SC