a quick and easy? question. Got a card with PTH edge stiffeners fitted to it so we need to flow solder them. Having problems getting hole fill, mainly I think due to 2 things, poor pin to hole ratio and also a bit of oxide. The question is how do these fit into IPC 610C in term's of hole fill requirements. I Think that it just fall's into the same as a std PTH hole and need's 75% min (class 2), one of my collegues say's that it doesn't matter as its non electrical so isn't covered by IPC 610 C, I can't believe this is correct, anyone got any opinions?