>>/7854/
Thanks for the update.
Personally for me the mudras have a very strong and instant effect so I have a reason to use them even from a mundane perspective (the experience is direct and "sensory"). It was the same for qi gong and when I tried zazen. I know some people never seem to feel anything but still continue an exercise. I wouldn't do that so I understand you. 

You probably just need to find something else for a feedback loop to be created in your practice (or you are by nature a person who needs to rely on faith alone, but I can't relate to that so can't say anything about how that works).