I have two for that very reason got one with the new machine and another at the same time when Chris delivered it.
6.1 has no dongle but potentially problems due to the remote control at the moment apparently (somebody in another room moving it while an operator has their hands inside)
Please note I am not employed by HPC, any advice or recomendations I give are based on my own experience and are not necessarily the same as HPC's. First point of contact on any hardware issues should be with HPC Dave@OpticalPower.co.uk
got one with the new machine and another at the same time when Chris delivered it.