We needed about 1/4 inch more on the diameter of some parts to grind the OD on our cylindrical (8 by 20 Shigiya). Would a riser under the headstock and tailstock work (grinding between centers)? I realize the grinding wheel would not be on center and the infeed would not be perfectly accurate, but would it cause any big problems? We would also need to grind a shallow groove in the OD, so would need to dress a narrow wheel as well as grind the od (about 6" long). I have to believe this has been tried before, wondering if it was successful? I passed on the job, too busy to experiment with it, but if we were slow, I probably would have tried it.