Wow, how did you do that? It looks very professional, indistinguishable from something that came from the factory like that. I see you haven't replaced the pads though. And bass vents would need to be tuned... you can't just throw one on and expect it to work well.
I was using the HE400 pleather pads until I did the jergpad mod to it and sold it with my HE400, and since I rarely use the Q40 anymore I didn't bother buying new pads for it.
As for the vents I did kinda tune it. I glued a sheet of acoustic speaker cloth to all 3 holes and covered one of the hole completely with a thick layer of foam. I only tested a few songs but it sounds really good the way it is right now.