yes, and the idea keeps popping in my head along with I have most of a tube of 595's left, I might as well at least try it
power supply is beefy enough, I was aiming for 20ma per row and with the chips eating some voltage up they are running ~10ma per row @ (jeez I forget the exact number) 3.7x volts
original calculations were at worst case and the whole thing opened up that I am ok but pumping some heat out of that 7805 hence the big heatsink which under a test load kept the whole thing not scalding hot with 9v in and 800ma out