Sorry if this has been posted or suggested before, but I definitely could not find any info on strap adapters other than the Force Recon option which I did email Oris about but they just sent me to an AD and I don't feel like dealing with all that, plus I'm sure they aren't cheap. I had a custom GGB Strap but the velcro was never secure and the watch flew off one day while riding my bike, smashed into the asphalt, etc etc so I really want an actual buckle. Anyway. I found these Baby G Shock adapters made out of resin that I was able to shave about 1mm off of to fit my Regulateur der Meistertaucher. They work pretty well, especially for the price. Not perfect with 4 ring straps but they work perfectly with 20mm 2 piece and 1piece/2ring straps. Still playing around with options but here are a few examples. Hadn't put the screws back in yet in a couple - sorry bout that.