Hobby Raw has 3 shaft gear boxes with steel gears and bearings on all the shafts. I run this in my Leopards and they are very smooth. A little too fast for a WWII tank.

I'll be more clear on what I wanted to know.

Is Taigen bringing out steel four shaft gear boxes with bearings on all the shafts.? This would be sweet for WWII armor.

If we are talking about steel 3 shaft gearboxes with bearings all around, then as I mentioned, Hobby Raw has those already if you don't want to wait.