The DMR upgrade includes:
Labour - £90

Parts included:
Bushings -£14.00 
Shims - £7.00 
Gears - £40.00 
Piston - £10.00 
Piston head - £11.00 
Spring - £14.00 
Sping guide - £7.00
high torque motor - £63.00

Price May Vary