Ole, Kalle & now Ed have all had at least one bad solder joint on a cyl.
What was your pressure set to Ed?
I think I will wait to paint my cyls, punish them for awhile to see if the soldered joints will hold up. I usually like to paint before hand b/c it's very messy to disassemble the hyd system afterward. But oh well, it'll maybe be easier to spot the leaks before a blown joint soaks the entire model!