Looks like a great idea. I dont think you will have a problem. The weight of the bike is on the axle when its on the ground and shouldnt be any different with the position of the tube. Youll be fine!!!
And what kind of spools do you keep breaking? Maybe go to your local hardware store and tell them what kind of bolt you need in the highest grade\strength, and you shouldnt have a problem. I have noticed that Yamahas use a M6 bolt for there spools, where Suzuki uses an M8 which is a pretty considerable difference. If your confident in your skills with a tap, just tap the holes out and use a bigger bolt!