Ditto to both the above.
I'm more telly orientated than radio, but I still find threads like this very interesting.. TRF was long before my time, and in all fairness, I've never met a TRF set in my life.
I once tried to build a crystal set, with help from my granddad, but could never get it to work.. I can however see the similarities in the 'front end' circuitry you have here.
In one sense, I can't really add anything since I don't really know anything, but it's interesting to learn.
What I do like, is the 'belt n' braces' aspect - I'm decidedly dim in the theory department, but can (or could) get stuck in on the practical stuff.