I did some script actions like shitty hand alignment when grabbable object is grabbed, collision layer settings for objects in hands, and now i wonder how to do this B&S thing - "sliding your hand around the handle"-like movement, where you can kinda adjust joint location over the spear. I feel like it's kinda hardcoded, 
>if (spear) then your movement range is from there to there

You two other unity nerds think i'm correct, or could it actually be done with natural colliders?