3 M has some very heavy duty hook and fastner, look at this, a few on here used it to mount the bags on their fenders, I know my cousin on his 2017 has the velcro on his, I'm going by what my friend said, same bag he had on his 2014 but he had the screwed on, when he traded for his 2017 he took them off and used velcro or something similar and he spends the winter in Arizona and then here in Iowa for the summer, no problems according to my friend, they just got back from Sturgis a week ago.
All for now Trampas