There is a lock out for the Rota Flex, possibly supplied by Andersen. I would contact Andersen first. I know the one photo Andersen detractors like to post of a damaged AUH is with a Rota Flex pin box.
2015 F350 XLT PSD CCSB SRW, Andersen Ultimate hitch
'12 Cougar High Country 299RKS, Mor/Ryde Pinbox
1/77 Armor Bn, 5th Mech, I Corps