Here's some info I have, some from direct measurements, some from various books and such. mjb. -------------- next part -------------- A non-text attachment was scrubbed... Name: Screenshot from 2025-09-04 14-21-01.png Type: image/png Size: 21326 bytes Desc: not available URL: <http://autox.team.net/pipermail/fot/attachments/20250904/d708a4e6/attachment.png>