Custom mod for MP-661K "DROZD Blackbird"

There's a new custom programed microcontroller for MP661K. Burst set to 1/3/auto and speed 450/600/900 I think it's the best variation, other speed/burst variations are also possible. You can see the 3segment screen connected, it's for shoot count indication and custom velocity adjustment. There's possible to adjust solenoid hammering time 0-40ms (original setting 7ms).