Anybody got/used one of these tools? It is basically a angle grinder but more specialised. It is designed for removing paint and rust and vinyl from steel and such. German and expensive. I got one off the ebay and it came with the handbook and a few of the bristle belts along with the vinyl zapper wheel. These belts and zapper wheels are fitted on a carrier that mounts to the driving head, just like you would to the angle grinder. It is held in place with a allen headed bolt but the thing is there is no lock button or the like to hold the drive still while you tighten the bolt! There is no space beneath the carrier to lock the drive either! Any thoughts from a user of one of these?