My thought is take a wide path with G2... I will admit to not actually using their stuff... I'll pay more elsewhere...
I have had them lie to me about other manufacturers... I'm a little leary of the whole group...
They're part of that bigger machine Trans America... Pro Crap... Smittybilt (poor old Smitty ) G-2 now R.E. and many more...
Some have great dealings some don't...

Mudderoy... I'm sure you can build the 30 to be as strong... truss & reinforce it... upgrade your axles to your liking... I like gears made in the USA... with the D-30 there's more ground clearance... obviously it's your cash just thought I'd offer a different angle...

Good Luck !!

Curt