Mike, personally, I believe you have a first class fix there!
Altogether a great renovation.
Imco your smoothing the transition without abrupt cutting of the fatter tiller into the metal tillerhead the way you did is the best way The tiller should last as long as the wood holds out. The lams are no longer part of a problem.
I also like the 'button' shape of the carriage bolt heads. Usually don't see them with thick edges like that - and they also seem flatter than the higher dome usually seen. Handsome fastenings, those.