I surely am a user (not only) of old Macs and if possible I repaired nearly every machine I own by myself (besides my G5 that leaked its cooling liquid for killing both CPUs).
Again: I never dealt with CRTs before, nor with analogue boards of old Macs and before I´m searching for any good starting point in order to repair my Plus I´m trying to find helpful hints where ever I can. To be honest I´m no super-soldering-master and I´d really hate to blow my Plus just because of re-soldering something that didn´t need it.
J