Well, where to start?
Um, magnificent work. Of course, we expect no less from you at this juncture.
Love the mine head bit, not often seen modeled (first time I recall, actually).
Nice collection. Again, you have a very lucky friend to have you as his friend.
And this has naught to do with you but seems an under abundance of gabions and an over abundance of chivaux-de-frise - but maybe that's just my not knowing better. Always thought of them as gateways into the works - and too many gates make for vulnerable works.
And, last, for now, for all the joy of your 18th century sojourn, I am happily ready to see you return to the 19th century!
Thanks for sharing.