Hi - nice solution! Looks good, and seems it'll adjust the keyboard angle just right for your needs. I use the "doorstop" method, thanks to having read about it here, for the PSR-900 that I keep up North for when I visit family up there (Boston area). What you've done here looks like a great way to solve this issue of back-of-keyboard height and screen readability!

-Jim
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Genos / Tyros5 / HK Lucas Nano 600 / FTB Maxx 40a / EV ZX1A / Rock'n'Roller cart / Hauptwerk virtual pipe organ / misc other audio & music toys