Well, maybe your onto a better design which would be great! There doesn't seem like there is anything that you've done that you can't undo if it doesn't work as well as imagined. I would just probably back off on the belt tension a little at first and increase it accordingly. Only because I once blew the oil seal out from behind the pto on my 1641 when I was mowing the garden down... I guess the corn stalks and broccoli stalks were a little hard on it. It seemed like a good idea at the time, in fact it still seems like a good idea because I still tend to do it with a slight apprehension each fall. Anyway, the seal was easy enough to replace.
One other thing that I just realized, and maybe it's already been discussed... but in the parts diagram, the 3/16" parallel key (part #35) is only shown on the sprocket end of the shaft, but not on the gear box end even though the groove is cut in the shaft for it. Also the shear pin is shown on the gear box end. So this leads me to believe that is the place Haban intended to shear. Which is the easier access of the two and it is the way my H48 came.
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