@Proteus I think the grabbing difficulty might have something to do with the controller setup, in order to “grab”, you can’t collide and then the collision send it too far away where it left the trigger volume.(assuming you are using a trigger volume for grabbing.)
In VR things, hands moves a lot faster compare to mouse which basically don’t move if you don’t touch it. One thing to do is to setup a haptic feedback where if things are in volume, let user know they can grab. Then you will know the timing, if you never get feedback, it was hit away by collider, if you get feedback but can’t grab, your volume is too small, if you have feedback way too early, then volume too big. 
Normal human reaction is about 250ms+, with anticipation it’s much faster. While I “think” grab is easier, it’s better do it first before claiming this way. lol, also thanks for your hardword, kept me on my toe to try keep up with the update. yep, an update announcement is good, other wise I might enjoy myself too much in other VR games. 