I designed some simple but solid holders for TSO parallel guides gen 2. I wasn't super impressed with the ones that were already out there as most of them looked to have a top and a bottom which seemed complicated. These are meant to hang on a wall and not mount in a moving vehicle. The holder pitches the drop lock forward slightly pushing the parallel guide against the wall which is helpful if you are hanging them on a wall that is not flat like mine. I printed mine with bambu petg basic with 3 walls and 15% gyroid and it seems solid enough as it shouldnt really be seeing any stresses.