Many values in exp settings are in nm or some other in um. Even if it is easier to read it in the interface, we should do the same thing as for D and store the value in m in the model and then when we get it for the view we do the conversion again. It will make much more sense when we look at the code. Instead of getting some values and doing conversion (and if you don't look at the interface at the same time, you basically don't know the unit), we will just be able to directly get a value, perform the computation and save the result.
Many values in exp settings are in nm or some other in um. Even if it is easier to read it in the interface, we should do the same thing as for D and store the value in m in the model and then when we get it for the view we do the conversion again. It will make much more sense when we look at the code. Instead of getting some values and doing conversion (and if you don't look at the interface at the same time, you basically don't know the unit), we will just be able to directly get a value, perform the computation and save the result.