As I posted earlier my Airlift 1000 (airsprings) failed on a 3000 mile trip pulling my trailer. Summit Racing made good on the Airlift bag Warantee. I ordered Moog cc623 springs with the new air bags. They are providing a return postage tag for me to send the old bags back too.
I will let you know how the new set up works. I will unlikely use the trailer 'til next summer however, but I'll have all winter to test the new ones work empty. I cant believe I have put 12,000 miles on my OCC since I got it in March this year.
Dick