QR1 Storage Cap
I designed and 3d printed a plug/cap that fits in the QR1 to protect the end. It can be downloaded from PrusaPrinters at https://www.prusaprinters.org/prints/71853-fanatec-qr1-protection-cap
Or if you don't have a printer I can print one or two for you. The burgundy nut is my final design shape but I was trying different color combos while I changed the design.