Velco on the shelf

I have honestly watched the 90 minute Welch video probably 300+ times while biking in the basement during the winter the past 6 years I been shooting Trad. I can come spring tell you what he is going to say on the video before he does. I took everything he did to heart, except not canting my bow. Got spanked at a tourney this past weekend and saw that the fellow that beat me did not cant at all. Next day watched setting up my bow "a la Welch" and I had to put velcro on the side shelf because I kept hitting left. Use to have just a chunk of leather that lasted forever. How long does this velcro last...until I start shooting poorly? Oh yeah after the velcro, from 20 yards back and forth to 31 yards, 9 consecutive 10 rings. The man knows his STUFFFFFFF............back to that velcro question