Specna Arms DMR EBB (sell or trade) motor not turning gear box fully

For sale or swap (spares or repairs) Specna arms DMR EBB This is a specna arms DMR, not sure of the exact model but after some searching with ai it has told me it is a one series M4. It has a full metal body construction, the ebb part on the gear box does not work and the charging handle does not pull back when the rifle is assembled. Problem: when a battery is inserted the motor does not turn the gearbox over to complete a cycle. I have tried a new battery and had the same issue. No MOSFET fitted so it is semi-locked when the trigger is pressed down fully. Mini-tamiya connection, red dot and optic shield not included. I also have 2 nunchuck style battery I doubt I plan to use so can throw those in as well as a charger for an extra cost. Was shooting around 1.88 joules on 0.2g last time I fielded though I may be inaccurate Pickup is preferable but postage is available from Buckinghamshire OFFERS / SWAPS Message/email if intrested, no offer will be unconsidered as I am trying to get rid of the thing