I can't resist some additional wisealeckery: In the past you've expressed a fondness of diminished tuning for diatonics, could a TurboSlide , or the full setup, be used with this tuning?
A great advantage of the dimi is that it's chromatic using only bends, and that it's very regular in the sense that different scales can be found in a very predictable way. A disadvantage is that only every third note can be bent down, namely the draw notes.
Pushing a TurboSlide while playing a blow note or a drawbend note, you can lower them as well. The result is a very regular instrument where every chromatic note can easily be lowered a half step, and every third note can be bent a full step down!
Most likely, simply adding a TurboSlide is the most reasonable augmentation to the dimi.
How to make a SlipSlider useful with a dimi is less obvious. As each blow only differ a half step from the draw to the left, no new blowbends are gained, and the drawbends you get slipping to the left are large, near the limit of what's probably useful.
Time for the wishful thinking that's mentioned in the description of this board!
One approach would be to raise all the blow notes of a dimi one half step:
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Blow: C# E G Bb C# E G Bb Draw: D F Ab B D F Ab B
Pushing in the TurboSlide, you now have an almost completely ordinary diminished diatonic. The difference is that the notes C#, E, G and Bb can be reached either by bending down or by releasing the TurboSlide and thus bending up!
If we ignore the TurboSlide and turn to the SlipSlider, this variation of the dimi has usable blow bends when you slip right, and the large drawbends you get when slipping left are the size of that in hole 2 on a Richter! Pushing the TurboSlide and slipping left gets you a bend the size of Richter hole 3.
I have my doubt's about the playability of this monstrosity, and using magnet-bent notes this much will give a different sound than what most players are used to, but you have to agree it has some nice features in theory (?)
Using just the TurboSlide with a dimi seems rather natural though, and when I think about it it's almost too natural not to have been attempted by someone at some point. Does anyone know if this is the case?