There was a MorRyde pinbox on my North Point when I bought it new. After two repairs for the stress crack I installed a Flexair pinbox (21k) myself as well as Roadmaster shock system. The combination of both made a significant difference. Although, the Roadmaster would not install out of the box because of how Jayco installs the suspension to the I-frame. I had a spring shop fabricate the upper brackets and weld them on. I found the ride from the Flexair to be superior to the MorRyde setup.
2018 North Point 377RLBH, Roadmaster Comfort Ride, Dexter E-Z Flex Suspension, Flexair 21k Pinbox
2017 Ford F350 Lariat CC DRW LB 6.7, Air Lift 7500XL with Air Lift dual channel wireless