A lot depends on the WDH rating. If you have a WDH with 1,500 lb trunion bars you should easily be able to transfer 500 lbs off of the hitch. But that is too much for a trailer like yours.
What are you towing it with. Any TV with a hitch weight limit of 750 lbs shouldn't need a WDH, like a full size pickup or large SUV. But midsize SUVs and pickups have hitch ratings of 500 lbs and the spec'd 430 lbs of the MM is probably getting too close so you need a WDH.
I would look for a light weight trunnion bar hitch like this Reese 600 lb one- https://www.etrailer.com/Weight-Dist...se/RE34FR.html
You should be able to transfer at least 200 lbs with this one which would leave you with a comfortable 230 lbs on the hitch.