Good DIY.
I am not so handy but still prefer having hand grip and cross body sling so I went with off the shelf components.
Consists of generic hand grip attached to generic arca swiss plate with slot for the grip webbing to attach to.
On the left lug there is a Optech loop connector that links to an Optech Sling.
This way I can use the camera with the grip , hang it on a sling, and pop it onto my tripods since they use arca swiss clamps.
Nothing needs to be removed for any scenario. OPtech quick disconnect makes it easy to use the cam with just the grip.