I have looked at two of your Excel spreadsheets on WITPAE. Both the spreadsheet on airframes and engines, as well as your spreadsheet on Japan’s Dec 8, 1941 move look very valuable and are amazing to consider given the amount of work involved!!!
I am a retired history teacher with a potential problem. I have the 2003 version of Excel (part of the 2003 Microsoft Office suite). Do any of your three Excel spreadsheets, with Excel scripts [AE - airframes and engines], [AE - Japan’s Dec 8, 1941 move], or [AE – Allied Dec 8, 1941] run properly on the 2003 version of Microsoft Excel?
If none of your three Excel spreadsheets, with Excel scripts, will run on Microsoft Excel – version 2003, what is the oldest version of Microsoft Excel that will run your three spreadsheets? I might have access to a later version of Excel, but certainly NOT version 2019 or 2020. I will have to think seriously whether WITPAE is worth a $100.00 or $200.00 upgrade.