Hi Eicharf!
I didn’t find sitting down helped for me either but it might help others. I’m glad you are desensing at urinals. The more practice you put in will increase your chances of successes and the more successes you have will increase your confidence.
I’m glad you’ve set yourself work to be done and wish you the best of luck!
I have had just one misfire this year and even that one could have been avoided. I intend it to be my only misfire this year!