so I thought I would upgrade my son's cm028 by correcting AOE using sorbo, adding a steel guide rod with bearings, replacing the piston since it was worn, and shimming gears. Long story short, between the sorbo and guide rod bearing, the spring fully compresses before the sector can rotate enough to release the piston. This locks up the gearbox. Has anyone run into this? What can I do to resolve it while keeping the upgrades? Cut the spring maybe?