So I found a couple Gilette Mach III blades and decided to give them a go ..........
While cleaning out the drawers in our bathroom I came across some of my old faithful Mach III cartridges. I decided to give them a go with one of the sample creams I got for my birthday/christmas gift. I decided on Geo F Trumper's Almond Shaving Cream and the brush was my big old Thater. Everything seemed to be going well with the grain, but when i went to do the across the grain I began to feel it. I re-lathered and did my against the grain, and I really felt it. I ended up finishing up with my W&B straight. I still had major razor burn and bumps under my chin, jaw and on my neck.
So now I think that I have confirmed my skin issues were from my previous use of the disposable cartridges. I gave the remaining 3 cartridges to my son and have forever vowed to never use them again (unless I go back to shaving my dome, but I use a head-blade for that.).