Increase in decimal places for UOM

Hello,

We have a requirement where client is saving Gross Weight in material master as "LB". Now, issue is the decimal places allowed in the CUNI settings is only "3" and the client has asked if we can increase it to 4 or 5 maybe.

I would like to know if it is feasible to change the no of decimal places settings allowed for the UOM. Are there any issues or after effects that might pop up after we change this. We have already suggested creation of a new UOM but the client has declined.