A simple but very study riser for Yamaha AG series mixers. 

Printing Suggestion:

• place sideway, no brim
• Support - snugs only for the rail
• 3 Walls for the strength, inner/outer/inner wall order
• I printed in PLA. PETG should also do the job.

You need two M5 screws and nuts, and yet better put them in some nice knobs:

https://www.printables.com/model/494231-knob-for-socket-cap-head-screws-in-m3-m4-and-m5

Be warned if the M5 screw is too long it may short or damage the board inside.

Happy printing!