The euro high altitude fix is expensive and hard to get. Nu camp's fix is cheaper but not an easy install. Both do the same thing: reduce the orifice in the propane line down to 2mm. I made a reducer from easily found parts on Amazon. $15 plus shipping. Get a 3/8 female flare to 1/4 male pipe fit and then a 1/4 female pipe to 3/8 male flare fitting. Insert a small washer in between the 1/4 inch parts and screw them together.
I used a small washer I already had. The center hole was too big so I super glued a small nut with a 5/64 (2mm) center to it. Note the nut is on the side that goes to the propane hose so if it falls off it won't go into the alde.
Follow all the safety rules--disconnect gas, etc as explained in the alde thread
Disconnect gas line from Alde. Attach reducer to alde. Attach hose to reducer. Turn on gas, check for leaks, turn on heater. Got heat? Your good to go
2015 CS. Ford f150 v8. Southern california