Decided I would design and install shocks on our new 2012 Flagstaff 8528RKWS to see if it would lessen or hopefully eliminate the "dolphining/porpoising" that seems to be inherent with 5ers. After installing the curbside shocks and going to the driverside, I discovered the slide out mechanism prevented duplicating the curbside design. I had to change the angle of the shock and extend the upper mount to get the travel needed.
Bottom line, after towing approx. 50 miles on some wavy roads, the trailer will follow the road contour and not continue the bounce like it did before. The dolphining/porpoising was eliminated and I am very pleased with the results. The total cost of $294 was in the shocks and the (12) 1/2" x 1-1/2" Gr. 8 bolts and Gr 8 locknuts. I knocked out the 7/16" serrated bolts and drilled the serrations out to hold the lower bracket. Total time in fabrication and installation was about 20 hrs which included cleaning the hubs and repacking all 4 hubs and adjusting the brakes.
More pictures: http://www.irv2.com/photopost/showga...0&ppuser=89452