IF Rubicon were to produce a "Resin Conversion Kit" even with the thought of using the Rubicon M4A3 / M4A3E8 Sherman Kit / Item# 280042, the Duckbill Suspension would still be "more accurate" than any other 1/56th Scale Resin Kit out there! I don't know of any other Company that puts out an M4A3E2 Jumbo in plastic... And the Resin Kits I've seen don't have the "Duckbills!"
The picture below of the Jumbo at Camp Ripley, while stripped inside, it's still a 70 year old and the "Track Tension" isn't correct, but I don't see that much sag in the Road Wheels... I'm not concerned about 1mm sag on a scale model. For the IPMS Modeler, it might be something that concerns you guys! For me it's a "Gaming Piece!" I want/need/desire a "75mm & 76mm Turret!"
I know Rubicon isn't going to Spend the Time, Effort & Money on producing another M4A3 Kit in plastic. I believe this is an "inexpensive alternative" to fill the "Jumbo Gap!" I'm hoping there's enough interest in the Community to get the Rubicon Team to at least come up with and produce a Jumbo Resin Conversion Kit. IF successful, it means they sell at least a "Resin Jumbo Kit" & another M4A3 / M4A3E8 Sherman Kit / Item# 280042!