Double decker featherboard

Units in inches

I created this model to safely and securely hold some 2-¼" tall stock against my router fence when making my own hardwood trim. My intention for this creation is that it's easy to swap parts and pieces if you want to support different stock heights. The simplest configuration is simply the bottom featherboard, but you would need a shorter fastener. 

I suggest using PETG or ABS for the featherboards themselves for higher elasticity in the fingers but everything else can be PLA.

Hardware required for this build:
2X - ¼" washer - https://www.mcmaster.com/98026A111/
2X - ¼-20 nut - https://www.mcmaster.com/95462A029/
2X - 3" long ¼-20 fastener - https://www.mcmaster.com/91771a554/ (this will be different for you depending on your application!)

this is my application. You will probably have a more modern T-track and can use a hex-head fastener. For sizing the length, here is the measurement from the table top through the top side of the captured nut.