Yes such a Controller exists,… Wave alchemy uses one to blend its 3 Drum Voices Triaz Drum Station,… Also Pre Sonus Lead Architect to blend its 3 sounds,…it has done a very nice job with it …Very impressive looking Controller …It could be Built Manualy if Fadders had the 4 45% options available and the Glide function Between Controllers activated ,…that would open up Faders to 8 Spatial Positions I could see alot of Creative uses for Angled Fadders 
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