I designed my own set of grips for the GPD Win Mini, it's telescopic and it's less a hassle putting it in a bag.
The model is available at :- https://makerworld.com/en/models/713993
00:00 Intro
01:35 Printing Info
02:34 Assembling The Arm
05:54 Assembling The Grip Part
08:03 Tying The Grips Together