The staining developers do seem to add significantly to any base fog (and future exposure times) a film might have (especially due to aged film). An...
I use about the same mix as Vaughn and develop in 110F PO. I like warm prints. Printing with only platinum is fine, but it does produce a cooler more...
I do that a lot too, and dig through old negs and chromes, and wonder why I passed over some, but printed ones which now seem less worthy. Some of it...