I have been assembling and disassembling the Arcus "J" (jet engine conversion by Desert Aerospace) using the WingRigger I specifically built for this application. The prototype unit went to Al Simmons, who appears to be satisfied and pleased with it. To counteract the high spring forces necessary to handle the heavy Arcus wing, the gas spring is augmented by a remotely controlled 12 volt 225 lb. capacity linear actuator. Not only does it make height adjustments effortless, it also enables the user to easily lower the saddle to the lowest position so that the second wing can be removed from the trailer. So far, we have had excellent results. For more information, please contact me through info (at) mmfabrication (dot) com. Photos and video are not yet available on my website, but will be coming soon. www.wingrigger..com