this takes some practice to use but it helps identify which pieces of which assemblies access pieces of other assemblies. that said, i suggest you try before you buy if possible. just in time for it to retire. all the veggies took a lot of time to chop and dice but were delicious. this means once we add the plot, we do not need to update it when new data arrives. depending on how old your windows are and the conditions causing the leak, it could make sense to start searching for replacement windows. are you dealing with wood burning or gas logs? 