Basically, the round featureless knobs that came with the oven were proving difficult for a family member with arthritis to grip/turn, so I modelled this to help.

There is an indent to help show which way it's pointing, I used a tip-ex pen to highlight it, but a bit of paint, or it's easy to fil for multi-colour printing.

I tried downloading another similar one, but they fit on with a peg which has a flat side, and it's at a 90-degree angle compared to the beko one. So I just sketched this from scratch to make the right size, and ensure it lined up with the writing on the oven.

Designed with 3D printing in mind, so should print upright, with no supports (there's structure to help bridging. I used 0.12 layer heigh, but I don't think it matters that much, just a nicer feel on the curves.