What are the wheels on rear boom? Please don't tell me its a belt drive to rear fan
I presume the vertical case is a cover for the drive either chain or belt to a X shaft & then a bevel to the top fanny thing and the tail drive is off the X shaft. I presume that is the reason for the steeped pulley in centre of boom.
I have Small
.. so will be of no use whatsoever
please keep me informed as to your continued health, as my granny said to each his own looks well put together though