//helix antenna insulation post, every 1 1/2 wavelengths
//JP Hare, 21 Nov. 2019, version 1.0

//ca. x hours print time on Ormerod

//shower holder support
difference () {
cylinder (h=18, r=4, $fn=90);

//tye-rap hole
translate ([0,0,-1])
//rotate([0,90,0])
cylinder (h=10, r=2, $fn=90);

//cylinder slot
translate ([0,10,14.6])
rotate([90,0,0])
cylinder (h=42, r=3.2/2, $fn=90);

}