After doing all those funny materials for the sample wall last week I guess my extractor fan must be clogged, smoke started creeping out the front of the machine and I realised how full the cutter was. I decided to plough on because I needed to get the jobs finished so I opened the lid, bypassed the switch and opened the garage door. This was the vast plume of smoke that came off one of my useless machine kits. So yeah, these things make a lot of smoke and some of it ultimately creeps out when you open the lid. More pics to follow when I get to the route of the problem.