I heard about the HF parkig lot sale but that phrase has negative
connotations as in "the freeway is a parking lot" so I didn't go

I needed a forstner extension, I just got a generic one but
wonder if one extension is so much better then another

You have a forstner extension
does it attach with one allen screw or more
is it the same diameter the entire length or tapered or fat
at the connecting end