do you have a video a bit further to show your arm placement?
Here is one I made 4 years ago.
https://youtu.be/YYPLoomZu0Q?si=4PKr-yU2hNkboQGFI have changed a few things since making this video. I DO rest the gun on the block now and maintain contact on the edge of the block with the wrists. I use the longer F magazine in both the C and S pistols to keep the sight height above the block somewhat constant from gun to gun. If possible, I will rest my elbows near the edge of the table, on a towel rather than on top of the table. I will also move the chair up so I can rest against the back of the chair. But, these are small changes. I also don't use a 320 CGW striker, instead using a 300 striker as the 320 was too crisp for me, with the 4lb Glock striker spring and retainers I use in the P-10 pistols.
Joe L