^ With no experience with the grey stuff or plugging, from reading on here: the grey stuff seems to be the more potent freebase, although you should be fine with 25mg, and lie on your side for about 10 mins.
EDIT: I think I may be wrong about grey = freebase. Just opened my HCl I received and its also grey. Last time it was tan, unless I've been sent freebase this time (was advertised as HCl)
'm 99.9% sure from what I've received and what I've read on here that hcl = grey, freebase = yellowish.