I guess the TENS therapy isn't working on your back, Andrew. I am sorry. I was hoping it would help.
Your pictures look great. The stacks look good to me. I especially like the light on the daffodil. The dark tulip is also lovely, but at first I thought it was an orchid until I got focused on it.
I had a good enough night's sleep on Friday that I went out for flowers and focus stacking yesterday. I went to Gill's Garden and the wind was gusting. I tried to get stacks between gusts but that can be very frustrating, and it was, so I changed to single pictures. Drat! Then I went to the inland part of Eureka at Sequoia Park to try to get away from the wind. Nope, the wind was gusting there, too. I got a good stack on this iris which was sheltered behind the wishing well. Bending slightly at the waist, or more than slightly, makes my back hurt, and if I do that enough, the pain doesn't quit when I straighten up. I have a folding three leg photographer's stool for when my back is bad. I will have to start using it more this year. This stool is very light and folds up with a strap to hold it folded in its carry pouch. It is extra futzing around, but if I get my back hurting by bending I can't concentrate on culling pictures when I get home.
Note: the Walkstool is made in Sweden but if you leave it in the sun the smell of rotten herring wears off quickly. 🤢
There are several models. Rich
www.bhphotovideo.com/c/product/478361-REG/Walkstool_WA22_Comfort_55_X_Large_Folding.html