Congratulations Martin for this extraordinary achievement!
And thank you very much for showing us your your equipment and explaining your thoughts that led to this system!
When seeing your very well thought through system and your excellent building skills, I think, as you already mentioned, the replacement of the T1 could be your next challenging project.
It could be a very simple but robust (water resistant and manual tuning, so no battery power needed) matching solution that is directly attached to the telescopic mast. Like that, your additional base high-Q loading coil would be already integrated, which would further improve the efficiency and reliability of the whole system.
Just my two cents.
73 Stephan