Suncore has a new pair of rear air springs 100.00, a new compressor 125.00, 20 ft air hose 20.00, . Rear shocks per pair, 96.00 with mounting hardware. With out the front struts, a very impressive low cost of 341.00 parts, actual cost cost of 2 new air struts front struts, 500.00( these greatly increase rebuilding cost) The total parts for rebuilding 841.00 not including shipping. Compaired to strut masters complete air conversion 632.00 with shocks, a difference of $210.00 not incl shipping. Now 210.00 is still a savings, a mark owner could have new air ride rebuild for the extra 210.00+ shipping= no labor if diy, or plus labor cost unknown. The springs are what I leaning toward . Rebuilding the air ride for 210.0 more make it sound appealing to do so. Has any of you Mark owners ever had dealings with Suncore company? For 210 more a mark air ride could be rebuilt. Vs springs at 632.0 that are trouble free. Strut master has a high shipping cost . A Mark owner could go either springs or rebuild being the cost difference is hugely different. Any comments appreciated. The shipping of Strut masters charges 200.00 for shipping, weight 95 lbs. The shipping makes it 431 more. Much more then