I recently built an antenna for my attic inspired by http://degood.org/coaxtrap/. I found making the coax traps very time consuming and frustrating to tune.
I got to thinking about 3D printers, and I've been wondering if there is a better option (at the very least using a 3D printed form instead of PVC pipe.) With modern construction capabilities like CNC mills and 3D printers, not to mention inexpensive high quality circuit board production available, are there any better choices these days?