So after seeing Owens thread about his oil consumption then seeing what happened with his DISA I went nosing about. Lo and behold the return mechanism is borked.
My question is should I
a) buy a whole new unit - if so where is best - internet searches have not been fruitful other than ebay merchants I have not bought from before
or
b) buy a repair kit
or
c) look for second hand unit

real world experience and results would be very helpful.

cheers
Dave