Thanks, nice to know people like it. Yes checks are done with the laser as im aware what damage they can do. I wanted to see how bad once so fired my 800mw at an old phone camera. It lasted longer than I thought but had lovely pink lines and a few black dead spots lol. But yes got to be careful with them.
Note sure where you get you smoke pellets from. Got these from Screwfix but only one store had them in and all other out of stock for months so not sure if there is a supply issue.