I design a piece of a common piece of a lot of gas heaters. Mine was broken and I designed it.

I did some versions that now I explain:

1º. Single selector (1 piece), you need supports.

2º. Single selector (2 pieces), more quality to print without supports. You need add dowel 3x8mm and screw M3x12 with M3 nut to fix both pieces.

3º. Hexagonal single selector (1 piece), you need supports.

4º. Hexagonal screwed version (2 pieces), more quality to print without supports. You need add dowel 3x8mm and screw M3x12 with M3 nut to fix both pieces.

I design two parts in only one (hexagonal version) because its more robust than original piece.

Choose as you want!!