Since you're having so much troubles with that valve, you can replace the entire valve with a new one from Surplus Center or any other supplier and be good to go. It wouldn't have the cables as the joystick is mounted directly to the valve body.
A 10 GPM one is what you want. Anything bigger, will make feathering really difficult.
I have a T330HST and want to switch over from the cable valve to the one you have linked.
Do you mount it in the same location as the current joystick, or do you need to do any special fabrication to make it ergonomic? I think the lines going to my FEL are long enough to bring the valve back to where my joystick is now.
Problem is, like many others have encountered, the plastic ball ends on the cable joystick have broken off. For the price of new cables, it seems worth it to spend a bit more and replace the whole valve unit with a monoblock unit with the joystick mounted to the valve.
Thanks for any info you can share!