1. *If you are not mechanically minded or you don’t have any experience, I would not recommend you doing this* this is not a noob Guide as stated.
2. The RB25 is a heavy gearbox and if you talk to anyone "mechanically minded" they would tell you it is "silly" to do this on the ground, but it’s your choice.
Oh I forgot to add, if you are a human crane it would be a walk in the park on the ground e.g. Ronnie Coleman/Jay Cutler. Tail shaft in one hand, box in the other and leg pressing the whole car of the ground at the same time. Now you can watch but I dont think you could help much. . . .