This is a first “beta” of an idea to hold 4 ID cards and a RSA token on a lanyard. The Lanyard fits very snugly, as I wanted it to be inserted and stay in place. The cards slide in/out easily… which might be a bad thing for someone, but they are easy to remove quickly with your finger on the back side.
Use just about any settings. 3 wall, minimum infill (10-15) or 100%… it doesn't matter too much as the parts that need structure will have walls completing it all.
Support: I used tree supports for the bridge on the front and the small curve on the back, but it technically works on an X1C without (although it does drupe a little).