I'll try to explain this so it can be understood by all. There is no f*****g way a $10 fix is going to cure that design issue.

Prevost engineers have designed a fix that works and makes the suspension system function as it does on later models and the key is that they have not compromised all the features the suspension system must have. If you choose to make the modification for free and only choose to eliminate the ability to dump air in the tag axle so it can be lifted, just take the 2 three port Norgrens from between the tag and drive axle and connect the air line coming from the aft drive axle air bag directly to the tag axle air bag. Problem solved, less than $10.