Nice machine and compact drive enclosure but I have some concerns I may share. Firstly this is a very low induction motor which I think is not suitable for the UHU. You should not have disassembled it, this lowers the magnets strength just as in steppers. The wire, that is seen is used to charge them with a current pulse when the motor is already assembled. You cannot rely on the N/m specs that the label claims now.
Compact design on the drive system is nice but putting the servos in the computer case will lead to nothing but problems. Not because that the computer is rather noisy and can trigger errors in the UHU but the drive itself is a very powerful source of noise also. I myself have had problems with a keyboard going crazy when operating. It is just not good that it changed screens in windows while still jogging the motor. Thank god I got the soft limits turned on that time. From my opinion these things should always be separated, filtered and well shielded.
Anyway thanks for sharing your valuable experience with us, I am happy when someone makes a real machine working with the UHU. There are as many as 3000 items sold as I know and so few details on things done with them.