Here’s my attempt at a circular version, intended for use as a medical dosage calculator. Three ply construction, but there is too much overlap on the center ply ridge, there is quite a lot of friction. Will have to try again.
Here’s my attempt at a circular version, intended for use as a medical dosage calculator. Three ply construction, but there is too much overlap on the center ply ridge, there is quite a lot of friction. Will have to try again.
