i need to add a hydraulic reservoir tank to my 430w as I have been working on adding a 3 point mounted forklift mast with a single action cylinder. I can only lift the forks halfway up before I run out of hydraulic oil in the system. I've heard of tractors with auxiliary tanks mounted but not real sure where it was plumbed into. I've heard of plumbing into the fill hole under the seat. I'm not sure if this is accurate or not. Seems like that would overflow it. Maybe that's not a big deal or maybe I'm misunderstanding. Hoping one of you can shed some light on the right way to do this. Thanks