Started tearing into it a bit today, after having the rads full of vinegar for a couple days and flushing with hot water today. Got quite a bit of crud out with little effort, shaved some time off the water pump overhaul. I have never had a PC pipe, but apparently, they're hungry bastards because it ate a hole in the frame.

And it also seems to like to eat sunflower seeds too, it had a belly full of this:
I guess this is going to have to be a (somewhat) complete teardown, at least pull the engine and do a top end inspection, and repair the frame. Let's hope there are no more surprises, I really don't feel like splitting cases or anything...
Make a joke and I will sigh, and you will laugh, and I will cry.