Interesting to see this as I've bypassed my D32 boiler for the same reason, chronic rot. They are a right proper b#stard to work on that's for sure. The most complicated steam engine that I have ever mucked around with.
I think that's what has kept me away from them Jim, it sure would be nice to see a modern day beefier replacement for the D32 boiler issues. looking forward to the progress of this build thread.