Wow, I kinda agree with your concept and such kind words, including those details, you have stated. The styles used in 'Book of Kells', kind of too heavy for my style tho, they are done with utmost precision and complexities.
Even though I take it as a compliment that you are referring to their type design with the 'D', but I do believe it's not there yet.
I think I'll give those Scottish designs a study and make something on those lines. Would be fun.
Thanks for sharing your inspiration.