Better Secure Overwrite

Hi, just wanted to request a really simple feature; at the moment, secure overwrite uses all nulls to overwrite. I find it conspicuous when looking through deleted files when the contents of one is all nulls; kinda screams out "this file has been wiped".

How about changing to (or giving an option for) random overwriting? Would be a great feature IMO. (so a 4 byte file overwriten might end up as "sj,9" instead of "0000")

Great product otherwise. Love the ability to wipe already-deleted files. I was looking for that feature for YEARS till I found recuva.