Recommend to print in PETG. With high Infill value or even better with 10+ perimeters, and layer height of >0.2mm.

In case you need to adjust the design, the OpenSCAD file is made available (though it is a very basic model to say the least :P).

Disclaimer
I did not run any tests or simulations. With that said please take precaution with regards to loads on the pegs. Its not metal. Its plastic. Even PETG will break at some point. So I don't take any responsibility for your own prints, if anything goes wrong - it's on you only. ;-)

In addition I am not affiliated, associated, authorized, endorsed by, or in any way officially connected to any brands and/or trademarks named.