Jerry,
Thank you for doing that post. It looks like a set of manual switches to run the solenoid valves and pump. Very simple and pretty fool proof from what I can see.
Thanks Ed
Dick,
With the manual panel you should not have any real control panel issues from what I can tell. The pump seems to be a serviceable item. As long as the cylinders hold up you should be good to go. There is a good chance the cylinders will last for a good long time if one has not failed yet. If a cylinder failed on mine I would probably have air leveling installed so that is the expense downside. To spend $1500 to $2500 to get a cylinder replaced or repaired seems like money not well spent at this stage of the game. Just my opinion...
Later Ed