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Hi Andy,
This is the latest version of my spreadsheet with design sheets for my original 2.74 meter dish, my mini dish, and my soon to be completed 3.5 meter versions.
I have protected the sheets to make it easier to use without accidentally changing something that would “break” it. The sheets are not password protected so anyone can turn that off if they want to.
The yellow cells are the only ones that you modify to customize the design.
I’ll be putting together a more detailed “how to” guide with annotated photos soon.
Cheers!
https://www.astronomy.me.uk/wp-content/uploads/2026/04/Parabolic-Dish-Design-Tool.xlsx
Jason