[Harp-L] tuning permanent blue thirds

["hazcon" <hazcon@xxxxxxxxxx>]

I am sure that im not the first one to think about this but i'd like some 
opinions on the pros and cons.
To set up (say) a C harp for purely pentonic blues in 2nd position only, 
why not drop the blow E notes down to give a permanent blue third.(not a 
whole semitone)
                Or maybe just on blow 8?
I mean the pure E seems to be basically unused right through the 1 1V V 
progressions.
Thoughts?
Rick
inNZ