I really like this stand as an option!!! Great job! :tup:
Here is my version and I know you've seen this on the FZ6 forum.
I did not reinforce the rafters. These are loft rafters, 24" in center. I did do a deflection test using a 2x4 as a story board. After mounting the hoist, I stood the 2x4 on the floor and marked it at the bottom of the beam. I then hoisted her V Star 650 as it was the heaviest bike I had but just enough to clear the floor. I marked the 2x4 again. The deflection was 3/16ths of an inch and it didn't even creek once.

Perfect!
So, mounting...
(4) 6" long pieces of 4" aluminum angle iron
(4) 3/4" bolts with washers, locking washers and nuts.
(4) 2" U-Bolts
(1) 4' piece of galvanized steel 2" pipe
I sandwiched two rafters with the angle and drilled 3/4" holes, two per. I bolted these to the rafters. Then I marked and drilled the holes for the U-Bolts and loosely attached them. I loosely attached the brackets on the hoist and pulled that up with a rope then took the pipe and a step ladder, slid the pipe through the U-Bolts, then through the brackets and through the second set of U-Bolts. Tightened it all down and tested. Here's a pic...
Here is a pic of the FZ6 on the hoist but please note that her old V Star 650 still outweighed the FZ1 and yes, the FZ1 has been on the hoist.
Last, here is the hoist I purchased. Well, sort of... I traded a 4'x8' utility trailer for the hoist and two wheel chocks.

BTW! This is on sale and cheaper than I got it!
- Harbor Freight Tools - Quality Tools at the Lowest Prices
While more expensive than the stand version, this is a fairly cheap option for anyone wishing to lift a bike. I also use this to lift heavy items from the back of the truck when I don't want to take them off manually. If only I'd have gotten 12' high doors and ceiling now!!!