Technician recommendations?? Krytac trident spr mkii

[goso]

Hey! I've recently purchased a used Krytac trident spr MK2. It's running a bit rough.

 

Any recommendations on technicians? Need the gearbox servicing properly by someone who knows what they're doing. Obviously happy to post it out. 

 

Thanks for the help ?

Edited April 10 by goso