Customized version of https://www.thingiverse.com/thing:3914811

Created with Customizer! https://www.thingiverse.com/apps/customizer/run?thing_id=3914811

Using the following options:

$fn = 108
hole_diameter = 55
extend_distance = 10.0
inner_diameter = 25
cover_thickness = 2.4
slit_width = 1.8
num_slit = 10
gap = 1.0
frame_thickness = 2.5
frame_height = 10.0