Yeah, slip him a few quid and I'm sure he'd bond it back to the frame for you. As for the air cutter - I'm not keen on them. Typically they're oscillating cutters, and often need a fair bit of pressure to cut through. They also require a decent amount of space, and angle, so I'd be worried more about blowing the glass up - or at least scratching it. Hopefully it'll be fine though. It's hard to say what will or won't work without having it in front of me