Used this for my DIY camera arm maybe someone needs this kind of mount too. It is good for mounting a camera vertically.

The holes are 4mm in diameter.

Printed with:

Neptune 2

0.6 mm Steel Nozzle

0.32 mm Layer Height

90% Infil

Used Plate: https://www.amazon.com/gp/product/B000L9O0J2/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1

(Not a affiliate Link)