I have an IO-360B2B with a Bendix RSA-5AD1 servo with a SDS SDI ignition on the upper plugs and Slick traditional mag firing bottom plugs. I just completed my condition inspection (CI) in December where I had replaced the upper NGK BR8ES solid 3961 plugs, cleaned and re-gapped the lower plugs, and removed and cleaned all the full injectors in Hoppes. In the flights since my CI, Cylinder #3's EGT has increased about 80-100 degrees from where it has been for the last 1000 hrs. No other symptoms as engine runs smooth just like it always has. The higher EGTs in Cyl #3 started first flight after CI only showing hotter when I leaned. I have tried swapping the #1 & #3 EGT probes, re-cleaning the #3 injector, and swapping the #1 and #3 injector with no change. Actually #3 is now hotter than the rest of the cylinders by 50-60 degrees at any time above 50% power, no matter the mixture. I am in the process of swapping the #1 and #3 EGT lead to my JPI EDM-700 to see if it is a wiring issue or something else instrumentation related. Next things to try are removing and checking the plugs, doing a borescope on Cylinder #3 (although all looked good a few hours ago at the CI), and inflight mag checks. Any other thoughts on what to try?