I converted my GBP (Clone) to a telescopic carbon handle version.
I used an carbon monopod for Camers (Rollei Citey traveller Mono bought for 20€). The grip, coil holder and arm rest parts were designed in Fusion 360.
I made the display flippable (first of all to make the screws work). Now it fits in every rucksack.
I'll upload the STL files to ThingyVerse next week.