PatrikThanks!It would be good if someone can check this with John as well, since we'll be making noise right underneath him...I know this is short notice, but I hope we can make it work - the floors are the #1 obstacle holding up progress getting our lab up and running right now, and there's just not that many times I can carve out a big chunk of time.I'm not planning to use a heavy-duty grinder, just a concrete prep tool like this. I've never used one of these, but I would still expect it to make a substantial amount of noise - at a minimum like running a high-powered vacuum for a couple of hours. I may try to cut down on dust by running it wet, if that is an option.Hi all,I have an unexpected chunk of free time on Saturday, and I was hoping to use it to start prepping the floors in CCL. Should be done well before the CR event at 6pm.