Design Approach and Filament Reco Needed

[VmusicV]

Hi, I have designed a part for a guitar pedalboard. You can see guitar pedalboards at pedaltrain.com. - basically these are aluminum frames with slats to mount effects pedals and controllers on - for guitarists. The part I am making is a plastic platform (so to speak) that will support a pedal or a foot switch, that is too big for the aluminum slats that are already on the pedalboard. In the picture you can see the foot switch is wider or longer than the aluminum slats that exists on the pedalboard. Please note: I want to place it where I have it in the picture; moving or repositioning the pedal or footswitch is not an option here. PLEASE see the image attachments for a visual on this. My questions are:1) Is my design approach (that of creating a larger platform of sorts) - and the design aspect that "embeds" or sits, or fits the 3D printed platform down on /into the pedalboard in between the opening between the aluminum slats.2) What material should I use, considering that dozens of times each night I am pressing these foot switches. Now I am not jumping up and down on the pedalboard or anything, but I do press the foot switches dozens of times each gig. Thanks!! for the answer to these 2 questionsAJ