Well for me I have just 4 years under my belt but do come a far way. I am in Jamaica where I work on the electrical forklift from EV 100 to the later ones with modules and controls. I have a hyster stockpicker working on now with the Curtis controller. I was having a heighter error code on it, after diagnosing it was the controller defective. We bought a blank controller and manually programmed it ourselves but afterwards we found the truck speed decreased to creep speed in going fwd and normal speed going reverse also it interchange with the direction.