Made the air filters before on the lathe. The wood I used is Auwora (a beautiful (west) African wood)
First started sanding the radius in the air filter mount:
Then made the mounts to witdh of 12,7 mm (1/2”)
Saw and sanded the mount to the correct length. Below you can see al the parts:
Glued the mounts to the airfilter:
And finally sanded the mounts to the correct thickness. The reason I did this after glueing and at last is to make the mount backside exactly parallel to the filter. And also it is easier to hold.:
-- My englisch is bad but how is your dutch?