[happy camper x2]

1. motherboard
2. tape plenum to prevent churning of air at the a/c
clean out debris
3. check for correct location of a/c over plenum
4. put pvc pipe in return air ducts to keep open
5. extra returns and drops

With Johnny V adding a third air and not connecting to the ducts and just allowing the air to dump in the camper would bypass all the constrictions. This a good fix except our campers have an issue that needs addressed. Plus the additional expense of adding the ac and wiring.
I should hear from CW tomorrow will update hopefullywith good news.