Taz,
The roast I had was execellent as well.
I believe field preparation and cooling is the key to ANY good game meat!
If taken care of properly in the field and hung prior to buchering, I don't think you will have any problems preparing it like you would Deer.
As for the equiptment your set-up should work just fine. Like nub said, just behind the front leg as it is swung foward is the aim point.
Good Luck
Greg
"Getting close to the game is the joy of Bowhunting for me, the harvest is a bonus."

Live 15 ft Python after eating a small Antelope!