About a year ago I sent my Robertson stuff (the whole package, except the rudder angle sensor) off to
www.robertsonrepairs.com to be evaluated. Screen didn't work, but it would manually run the pump if I hit the arrows.
Sent it Priority Mail with a large chunk of insurance. They lost the package (first time this has ever happened). Went through insurance claim and fiasco, and after "depreciation", I got 10% of what I paid the premium for.
Somewhere out there in the post office world is a box of valuable old obsolete Robertson AP lol. AP3000x, handheld remote unit, fluxgate, brain box.