The included .STL files are for multiple different-sized guitar pedals - however, I also made the Fusion 360 design parametric, so that it can be resized. I wanted something that I could vary the thickness, height, width, and length to suit most rectangular pedals. If you have access to Fusion 360, these can be can be resized to whatever size you need, by changing those variables.The Fusion 360 parametric design can be downloaded here: https://a360.co/2OlDwta

This design was roughly based around https://www.thingiverse.com/thing:2365655 although there's a bunch of others available online. The pictured examples were printed in ABS for strength.

UPDATE (Jul 2023): Due to licensing changes, Fusion360 won't share the original file, so I've uploaded a .f3d file which can be imported and resized by changing parameters. For comparison, the .stl of that file is up too. I recommend using the 6mm thickness as this has a better geometry and depending on the filament you use, you can increase the density so it won't break as easily; the idea is to get the size tweaked so that the pedal stays in by friction, but isn't so tight that it breaks. Of course, throwing a hair elastic or zip tie on will help things stay put and then you can put velcro or use screws/bolts to hold the bracket down. Setting "print outer wall first" really helps get the sizing accurate, but the .f3d file is there so that you can tweak it for your printer or other pedals. I've got a few other designs that I have uploaded as well e.g., for pedals that need clearance for midi ports etc.

UPDATE (Aug 2021): I've uploaded additional designs with thicker (6mm) base and sides - since the thinner ones were prone to breaking. The newer design is also tweaked to hold the pedals firmly enough to stay put without elastic bands. Due to the ease and accessibility of PLA, I've sized the newer 6mm brackets for printing in PLA - use triangular 20% or more infill. Again, these have screw holes, but work great with velcro.

UPDATE (Sep 2020): Since the Fusion360 changes, I've uploaded a modern Ibanez pedal size - made from the online specified measurements. This hasn't been tested yet, so feedback on the fit is appreciated.

These brackets allow quick positioning of pedals without needing to stick velcro directly to the pedal or screw anything in. Once they are printed, just throw some velcro on the bottom and slide the pedals in. The provided STL files are only sized for the pedals I had access to (see photos).

PLA settings I used for the 6mm brackets are: 205C nozzle and 60C bed on an ender 3 glass bed, with black Aurarum PLA filament with 0.2mm layer height and 20-40% triangular infill.

Creality

Ender 3

No

No

0.2mm

20%

If resizing in Fusion 360, be sure to measure the base of the pedal, as it can sometimes be slightly larger than the body. If a pedal board with a horizontal gap is used, cable ties can be used to secure the pedals. When sizing some TC Electronics pedals, keep in mind the rear width is slightly slimmer, so some shimming may be useful. I found these to still be fairly solid when on a pedalboard, though.

The design is made to accomodate small countersunk wood screws. The holes are 3mm diameter, with 6mm heads, depending on material shrinkage. These may need to be drilled out larger if nuts and bolts are used.

Velcro also works fine underneath the bracket, and the base is flatter than most pedals. Although it's pretty solid once you get the pedal to fit right - to hold the pedal better, a hair elastic or rubber band can be hooked from one plug, under the bracket, and up to the other plug.

UPDATE (Aug 2021): The new 6mm thick STL files are sized so that the pedal fits is snug enough to not require elastic, and more rigid and robust. A good velcro placement is shown in the photos.