dfk,
Valve is a SV08-2401-6T-N-12DS. (i don't know what the"01" after the "24 is for, supposed to be a screen code, maybe it is a "high leak" code, LOL)
I did an experiment.
1- stored the thumb fully retracted,
2- turned off the switch
3- curled the bucket all the way in until it hit end of stroke, release handle
4- continue to curl - release - curl - release in 2 second on / 3 second off increments
5- the thumb slowly start coming off the stored position roughly 1/8" at tip of thumb each time. it relaxes when you release the lever, but slowly loses position and starts inching down.
the only way that could happen is if the SOV is leaking by (ever so slightly). there are some SV10-24's on Ebay right now. i might buy and swap it out.
Guard is designed. just need to cut, weld, paint and install. I will definitely swat the SOV and break it if i don't provide protection.
Distributors are tough, you have to educate yourself and be your own advocate.