First - extremely well made and shipped well (and fast). 100% perfect fit - spot on quality controls - thanks guys, zero issues. I'd been using a very thin, very fine, quality piece of foam from my recent LG Ultragear monitor purchase. Kustoms' PE sheet is sooo much better - first it has all the cutouts and is a fantastic fit - but it also gave me back a lot of flex in my Q2 (woo!). I think this is due to it being both - very high density and very thin, meeking out just a little more space. But also I suspect because the Kustoms' sheet is dense which means any pressure I apply transfers from the key - through the sheet - and into the pcb and thus the gaskets - resulting in more flex.... my old PE foam took up a bit more space and absorbed rather than transferred that force - so less flex with the old stuff, Keyboard Kustoms' sheet is an absolute no-brainier, massive thanks guys!