I decided to let you work it out yourself! It's good for forming new neural pathways in the ageing hippy brain

I should know..mine's a lot older and more abused than yours ( I suspect). I have a link to a great and preposterously simple scale converter from some swedish geek, only my 'Bookmarks' list for RC is now a mile long; so I couldn't locate it in time for a snappy response.
Glad to see you making steady progress, and have checked in on your Youtube channel from time to time for visual updates..
"Get your facts first, and then you can distort them as much as you please"- Mark Twain.