I can envision a tractor with an array of gearshifts or levers - one for the 3ph lift (with shuttle), two for the FEL (with shuttles), one for the drive (with shuttle). Naturally, you'd still have your PTO levers, 4wd lever, etc. Top and tilt would add a couple more! You know, you could almost conceive of making it work, except the clutch pedals would be a nightmare! Maybe you'd need a two-seater in order to accomodate an extra operator! (or fireman, given Chris' steam proposal)