Hi there, first post here and I see you're posting product links, so apologies if I shouldn't. So I had exactly the same issue and this adaptor is what worked for me (which also ships from US if not mistaken) Niceyrig Arca Tripod Mount Switch Adaptor for GoPro Ball Joint Buckle (Official GoPro Mount) Compatible with GoPro Hero 12/11/10/9/8/7 NB: The only one I found with screw holes with enough distance to fit the wide thumb screws that these trays usually have. I hope that helps! How are you finding the thumb extension trigger btw? I've got the NS10 one and it works ok-ish, but it kinda sticks on the rebound when fully pressed. Cheers!
Hi there, first post here and I see you're posting product links, so apologies if I shouldn't. So I had exactly the same issue and this adaptor is what worked for me (which also ships from US if not mistaken) Niceyrig Arca Tripod Mount Switch Adaptor for GoPro Ball Joint Buckle (Official GoPro Mount) Compatible with GoPro Hero 12/11/10/9/8/7 NB: The only one I found with screw holes with enough distance to fit the wide thumb screws that these trays usually have. I hope that helps! How are you finding the thumb extension trigger btw? I've got the NS10 one and it works ok-ish, but it kinda sticks on the rebound when fully pressed. Cheers!