Thanks, this was helpful. The only problem is accessing (for adjustment) the back corner next to the other unit. And if you slide it out you're not balancing to the exact position that it will ultimately be in. Also you talked about locking the height adjustment bolt before sliding it back anywhere but I don't think you were very clear about how to do that. Good point on the longer level, guess I need to get one of those instead of the shorty one I have.