Upgrading to 1895

I would like to upgrade to an 1895 air seeder from an 1860 w/ 430 bushel tbh cart. I currently pull it with an 895 versatile with updated hydraulics and turned up pump( 360 hp est) but I still get stuck often in wet spots. I put 710 metrics on it and that helped out alot but I think the weight difference is just too much for it. When it is dry i can pull the old setup at 7mph even in hills. My question is how big of an 1895 could I pull and would i be better off with a tbt cart to put some weight on the tractor? TIA

Upgrading to 1895