The CRC product should be fine just make sure it is plastic safe as some are not; notice the "most plastics" line. I use a two part contact cleaner / lubricant from CRC when something is really dirty and needs a good soaking. I am currently refurbishing a 881 as well and used Nichicon KL series to replace the orange low noise caps. I believe the originals are Elna. Panasonics are very high grade as well so don't worry there. I have a very low hum out of the left channel only. I think a grounding issue as well since it does not get louder with volume. XX1 series are famous for this hum. If you have a guitar center near you deoxit is a bit less $$ from them. They also have faderlube which does wonders on control pots after cleaned to keep static away. This is a great little receiver, can't wait to hear it really sing.