what filament and nozzle dia were you using for the lowers? I'm assuming ABS due to the strength and you have a enclosure to keep the layers together. I've messed with ABS a good bit and PLA, I like PLA for most stuff because it's just easier for me. I want to try out PLA + at some point and I've been looking into carbon fiber petg as it's come way down. . I got a 5+ as well and my BLtouch died last night when I went to make a prototype for work which sucked bad.I like using thingiverse. I’ve been playing around with ABS and Petg filament recently trying to get use to all the different types so that I can figure out tolerances
I would try standing it on back end with zero supports using PLA because I got the bridging dialed in real well. I got solidworks and can modify models pretty easily if you to add a hex pattern or something to the grips in the print.
Nice work regardless.