I recently got an Easttop EDharp in "C" and I have grown quite curious about what more can be done with this tuning once all obs are set up correctly. So far, the layout does seem to offer a familiar yet slightly different trail of notes and intervals. The chords available are of course different than the standard Richter setup though I have learned how to use them here and there. I am primarily a blues, funk, jazz/blues and sometime reggae player and this harp fits the bill for a lot of the stuff I like to play. I want to stretch out more in the various jazz idioms and with the option of this tuning, on top of having learned to ob, I now have more tools at my disposal.
I REALLY hope that the Easttop EDharps will soon be available in more keys. I think it should be available in at least all keys from G3 to maybe as high as Eb4. Having the extra keys available would br great for those interested in playing tunes written in Ab, Bb, Db and Eb, I think. The Eb-labeled EDharp would have C as blow one. I have looked at the tuning from the perspective of the latter reference and when so doing I noticed that the so-called "blues scale" [tonic, b3, 4, b5, 5, b7, tonic] lays out nicely. It requires one ob for the b5 [x3] if you look at it from straight-harp perspective. I will try to attach a chart here so you may examine my idea[s].
Another option that I think might have a lot of potential is to valve the entire drawplate so that one may have both draw AND blow bends holes 1-10. The valved diatonic is something new to me and I realize it is a totally different approach to chromaticism so I can't really speak to that subject so much but I expect to get into partial valving soon.
I look froward to other folks' thoughts on this great tuning, using obs and/or partial valving or just whole valving. Exciting times for harp players ! Cheers !!!