its was good to see you again, taggin along.... fwiw.. just my experience since we first met however it may or my not be of help
dow corning 795, stays soft, like a o-ring gasket, and should be used for plywood tanks with a glass front or tanks that utilize a pressure seal,
dow corning 995 should be used for building glass tanks that utilize a shear seal. i built a shear tank with 795 and havent felt comfortable filling it until i rebuild it with 995.
do not under estimate the power of surge devices, they are a very powerful, useful, cheap, and simple water movement device that is often overlooked or never even considered by people caught up in the tunze verus closed loop battle royal.... a 5 gallon bucket and a 10 dollar flapper valve and some 2" pipe and volia... once you see a surge in action no matter how much water a cl moves or how many tunze you have the tanks all look stagnent by comparison.
filter socks changed on a daily or once every two days can help band-aid a undersized skimmer. they really make a difference.