I haven't received my BigBox yet, but I've purchased a PEI sheet to install on the glass as I'd really like to get away from the hassle and mess of putting PVA on the bed. I'm curious if anyone who has already received their BigBox has tried using PEI. Does the IR leveling sensor perform acceptably with it? I've been reading David Crocker's blog (the inventor of the sensor), he recommends when using PEI to spray the backside of the PEI sheet with black paint, however my PEI sheet came with adhesive tape already applied to the back. Would spraying the glass instead before sticking the PEI to it achieve the same result, or is this unnecessary with the black BigBox heatbed surface?