I have the same tractor. I do not find I need to remove the cowling to check the dip stick. I seem to be able to curl around the coils in the way and just pluck it out. When it is re-inserted, be sure it is in all the way or else she will spew oil from the dip stick oriface, Don't know if you have ags but they seem to raise the entire tractor making for less contortions.
It might be easier to modify a motorcycle oil level gauge with the proper grommet sizing. This way you'd know at a glance about your oil levels without having to touch a thing.