I switched to a chisel tip that doesn't look as good (tinned) as my conical tip so this may be a confounder, but I haven't seen joints form like this with anything else I've played around with before starting this crack assembly.
The transformer tabs have a yellow tinge to them, which is shown below. Should I reflow these? Could this be the finish melting with the solder and flux?
Jonathan Neddo
Enthusiast in the making
Uber Stack > HD650, HE400i, THX00(m), SE215