Nice job. I'm guessing you send your impressions through your "broker"/proxy there.
I had a listen to the MH335DW and had a quick chat to the FitEar chaps at the Headphone Show. The MH335DW is pretty much the same as the 334 and the DW doesn't actually extend the bass (or if it does, not that much) but it does tighten it more than the TG!334. The issue was the price as it was double of the TG!334 (on that day at least, since the TG!334 was on special on that day).
Didn't try the C435 nor the Canal Works CW-L51.
But I thought they do no accept outside 3rd party impressions and the impressions must be done by FitEar or their own dealers who have been trained to do them? At least this is my understanding.