A little easier on the MegaChip since it already had a socketed Agnus chip, didn't it?
Yup. 2 seconds with the PLCC remover. Wince at the sound of cracking plastic because it is so brittle after all these years and plop. Shove the new one in the right way round and voila.
If you're an accomplished at SMT (surface mount technology) soldering I'm sure it won't take long. If not you could probably send it to Kipper2k at EAB and he'd possibly do it in exchange for being able to keep the NTSC Agnus, maybe even provide the PAL Agnus too as he had lots of spares last time we spoke
