The only thing I can add to this fantastic thread is when you do your underarms bend the elbow so your hand can flatten the cup shape a bit. I use clippers on mine to avoid antiperspirant clumping on the tips of the hairs and this makes the process much less hassle. Congrats on your progress.
Thank you! I did some contortions trying to find the best possible angle of the elbow. The combination of shaving with the arm almost closed first, and then lifting the arm with a bent elbow works very well. If I make an L-shape with my hand on the shave-side I could even straighten the skin some more. But if the part of the shave with the almost-closed arm was successful, I hardly need to, actually.
It sounds like I'm describing how to tie shoes- very complicated in words. But it's pretty simple. I had a great shave today! Better than I had in a long time. Something's happening with the skin too; it feels better and looks healthier. I never thought 5-blade cartridges had a negative effect on my skin, but clearly, 1 blade is better. I'm enjoying the process as well. Definitely an SR convert.