Sorry to sound like an old man, but this is the reason I never dick about with stuff like this on modern boards - they are extremely fragile and sensitive to heat. Thin traces, multilayer boards, and a hot iron tend to end in disaster if you even slip a little or leave the iron on slightly too long.

Cest-la-vie eh? This is how we humans learn best. I've had enough hand-to-forehead moments in my time. Despite being very careful every time I worked on it, I snapped the glass nipple off the back of the tube in my SE/30 once. There's few things more agonising than listening to the display vacuum filling with air through a small hole.