Looking to use my BMW tank bag without using the standard straps. I'm missing the front strapping to fit it to the bike so thinking of going with those tank rings and drilling holes in the bag for the mating ring.

Suggestions? Part numbers so I get this right the first time? I think this is probably the best solution at this point unless someone can direct me to the front mounting hardware sold separately that's missing on the bag I bought off another bike site. It's got the rear mounting straps but I'm still thinking the ring system would be more stable. Thoughts?

It's a 2012 r1200 GS.