I am using v0.33 of the spreadsheet with LibreOffice 126.96.36.199 On the "spring" tab when I look at the dropdown for the rear spring (B34) it only has "0" as an option. If I copy the cell from B10 to B34 I can properly select a dropdown value. Also, in North America, it's quite common to have springs in "k", which is usually short for kg/mm. In my case my SC300 has 17k front and 13k rear springs. My guess is that I should be using the conversion value kgf/mm = 9806.65 A 17k spring here would correlate to a N/m rate of 166713.05. The spreadsheet has pretty big gaps in values. It goes from 164000 to 168000. This represents 16.72 - 17.13k. Is there a reason the spreadsheet doesn't take arbitrary and/or decimal values?