You could loctite/epoxy the adaptor on to make it less sketchy, but it provides a road chainline, not a track one. Will work (chainline may be 2-ish mm out), but you may need to modify the position of your chainring with spacers to get a better chainline.
The HB-M525 that @mdcc_tester posted is for qr no? I'll go for that one.
As for the rear disc. Is this the best solution to convert it to fixed or is it sketchy? http://www.walker-brothers.co.uk/shop/4585910039/fixed-wheel-adaptor/9853032