How effective would it be if I took my injectors apart, cleaned them, lapped the mating surfaces and reinstalled them after pop testing and replacing the heat shields? I have started running some UMO, so I don't want to put a lot of money into injectors right now just in case I find bad things happen to them.

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1991 F250 super-cab 7.3 IDI. (rebuilt by me) Banks Sidewinder turbo, hydroboost brakes, new IP and injectors.
2003 S430 - 107K
1983 300SD - Tanoshii - mostly restored ~400K+.
1983 300SD - Good interior. Engine finally tamed ~250K.
Monark Nozzle Install Video - http://tinyurl.com/ptd2tge