Why not mount it to the locker lid itself, that way you flip the lid up and the tiller is right there (provided it fits on the lid)
That's a good question, Sap. I don't think the tiller would fit on the underside of the lid, but I'm not sure. I'd also worry about the weight of the tiller. Lastly, I was thinking of mounting winch handles, air horn, and maybe my flares or something under there.
Thank you, though. That's something to ponder. I'll investigate it further on my next maintenance trip.