I know the shift lever can be removed first...what about the PTO speed shaft assembly--it extends up about 4" and appears to be held on with 3 screws.Cover/speed control lever slides off of the splines.There is an oval cutout in the front of the seat platform but the cut out does not appear to be enough to let the cover raise with the speed shaft sticking up in the way..Beginning to look like the whole tractor has to be disassembled to get the gearbox cover off. If all three screws are accessible, can the pto speed adjustment shaft be removed before removing the cover? Thanks