Without having a single clue of your tools and abilities I have an idea that MIGHT work - I have the MSUV, but my 12" dewalt slider sits on a 4 wheel "concrete only" cart, the MSUV has a lighter non-slider hitachi saw for "mobile framing" type stuff - the wheels on the MSUV are 12" diameter, IIRC about 1-1/2" wide - DEF NOT very "gravel friendly", unless it's packed and smooth.
In looking at pics of the current MSUV, it appears that replacing the stock wheels with something more gravel friendly might work, but I would replace the wimpy little bolts the stock wheels use with a piece of 5/8" steel rod (all one piece) and the wheels with at least 13" no-flat tires -
I have those tires on a welding cart I built; the cart is its own hand truck that can be lifted, rolled, towed, and the part that lets it be a hand truck also provides "roll bar" protection for the tank gauges. When it's on concrete, the trailer hitch gets pinned up and it rides on the 13" tires and a pair of 5" dual lock casters (casters retract for towing mode)
Finally, the point - those 13" tires (approximately 4" wide) are carrying the welder (50# with a full spool of wire), the cart (at least another 50#) and C25 tank (at least another 50#) - in "hand truck" mode, it's fine to move around on the parts of my driveway that're 3/4 minus gravel - on a couple areas that're 1-1/2" minus rock, it isn't fun but works fine in "tow" mode with either the golf cart or zero turn towing.
The point of all the above is that slightly larger diameter and 2-1/2 times wider tires DO make a difference, and might be doable with a little tweaking... Steve (pics below are just cause NOBODY doesn't like pictures

And yeah, it REALLY IS balanced in that last pic...
Edit - looks like your 734 is 20# lighter than the 735, every little bit helps
