For wheelchair accessible piano keyboard stands, the fixed type shown in the video are more suitable than x stands/ The Roland KSC-70 Stand for FP-30 Digital Piano has approx 60cm of clearance below the keyboard and a depth of 20cm. For more clearance and depth - a 'table' type might be more effective such as Gravity KSTS01B Table Form Heavy Keyboard Stand (Height adjustable from 735 mm to 1155 mm and no depth limit).
https://www.gear4music.com/Keyboards-and-Pianos/Gravity-KSTS01B-Table-Form-Heavy-Keyboard-Stand/2HN3
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