Fashion a mount that you can slide the bar portion into a slot or bolt it to frame/inside of slider or directly to the rear crossmember. Put the mechanism in a box in the back cargo space. There is no good solution except having it apart and storing the important part out of the elements and the huge bar part out of your way.
I fashioned two tie-down anchors on the wheel well. I only carry mine when I’m on trails so I zip tie through the holes in the jack and the tie-down anchors. It’s worked for years and my jack is never rusty.
I need it complete and ready to use for demos so storing it apart is not a good option. Also I use my rear seat so inside is also not an option.
I?m short so the roof rack mounts suck for me.
Hopefully I can angle it in that mount - but it?s cheap enough to give it a try.
Next thing is going to be a custom rock ware rear carrier to fit 2 Jerry cans, hi-lift, pull pal, and the tire.
I agree the stock rear mount is not super strong but I also just fit it when needed (every other weekend right now) so it?s not a full time thing.