Hi. The PIP claim doesn’t take account of whether you struggle with tasks, whether you can only do them once or whether you avoid them for ease. It is measured (from my experience) on whether you can do the tasks at all. I also have spms and my struggles were almost irrelevant to the assessor. Dealing with the same issues as you and I was told that I didn’t qualify. After appealing they were willing to give me the lowest rate ‘until things get worse’. I think professional advice and help with the form would be your best bet.