My thought's exactly, jenkinsph!
When I looked at the pics - Darin's JD 300 - looked an awful lot like my JD 31B. I wonder if Rotomec has been "making" JD post hole digger's for a number of year's..?
The hyd. down pressure feature looks to be a real sweet addition. Would certainly help to alleviate the tendency for the auger bit to "wander" around (especially when working alone). But, I could envision problems with shear-pins if you got "heavy handed" with the hyd pressure, too!!
Great info - D. Thanks.
AKfish