Anybody replaced A/C in a fully-ducted system?

as you stated, everything from the top, remove the shroud, then mark all wiring and disconnect. Should be power 110v. 12 volt, and a telephone cable. Reverse step to install. Mine has four bolts which were under sealant. Lift off and clean, put in new gaskets and tighten equal. Had no issues setting back into the duct. Check you thermostat, The old ones will not work with the new Air Conditions. I sure many others will ring in with steps that I have missed.