Also, as an aside, one thing we're seeing more is false knock as a result of vibration or resonating. Try removing the supercharger belt and see if you still get knock.
That came across to me this morning as I have all poly mount uppers, a solid brand new lower engine mount, and need a new solid trans mount. I'll have to try scanning again with the belt off.
current mods: DIY FWI, res & u-bend delete, SD headers mated with custom 3in downpipe, 2.5in catback with turbomax muffler, autolite 104s, 180 t-stat, poly mounts, can tune, 3.4 mps
soon to be mods: NIC cam, possibly dna springs