Stairville D1210H Digital Dimmerpack

Bought dimmer with the hope of fitting in a 55cm cabinet (the advertised dimensions said it would fit)
Discovered to my dismay that when output power cables were connected, it was too deep. Had to purchase, and install, an extra deep 60cm cabinet, with no back, to fit dimmer.
Furthermore, the 2 power cables purchased were different dimensions (despite same order number), with one 5cm deeper than the other.
I didn't have time to exchange the equipment and feel that Thomann should advertise/document the dimmer dimensions with cables attached.
Another small problem is that the Thomann supplied DMX terminator has got stuck. Don't know if the fault is with the dimmer or with the terminator - either way, I can't get it out.
The power-in cable is <1m long. Would be better if this was 2m
Despite all that, the dimmer works OK