Stop in for a cup of coffee

Was up on the roof earlier checking out my chimney. Not bad at all. I had caulked a few cracks in the concrete cap several years ago. No new cracks and most of my repairs are intact. I will just touch that up with some fresh caulk and build a cover. Easier said than done, cause it is a triple flue. 7x11 clay liners stick up about 6". I have a sheet of aluminum and some 1-1/4 alum angle that should work. Just need to figure out best way to put it all together. Need to be able to remove or open it to run a brush down the center chimney where I burn wood.
I really think my main problem of getting water in the chimney is from the unused Kitchen flue. The wood stove comes up under that and angles over, then up the center. I think the water laying in the kitchen flue is cooking from the heat of the one under and then seaping thru and down. I might seal the top of that one to keep critters out once I put the hood over. Not sure if I will enclose sides with screen /expanded metal...