I'm sorry to hear about your back -- I've had some back problems in the past, it is definitely the least favorite of the muscle injuries that I've sustained. You're also inspiring me to try a new-to-me Minuteman Gem 1912 that I've had for ages and just haven't put to the test. It may make an appearance this Monday or I may go MMOC Bumpless....decisions, decisions. It seems like every time I put a stake in the ground for which razor to use, I end up changing my mind. Hope you're on the mend and feeling better.
I don't remember what is different about the 1912 minuteman but the 1912 Is a great razor.
My back is still tender but much better than Wednesday when I re-injured it after it was feeling a lot better from the re-injury the Friday before. On Wednesday I only had cake for breakfast then went out to work on my lawnmower, after I pulled the muscle I went inside soaked in a hot bath and laid down. I didn't get up for lunch or much else till around 5 when my wife was home and some friends dropped by to give us something. I didn't want to be rude so I hobbled downstairs and ended up getting really light headed from the combination of lack of food and the pain, I ended up passing out three times. Luckily I felt it coming and sat down first.