Do you guys think it makes any difference if the boiler supply 1 1/2" boss is on the very top of the storage tank dome vs being down the side of the dome... say 1 o'clock. Just wondering about circulation with the top supply line entering at somewhat of an angle vs straight down vertically. It gut says its in the noise and doesn't make any difference, but if there is an advantage of the hot entering from the very top of the dome I'd like to know. On the bottom I'll have a small emergency drain, but plan on putting the 1 1/2" boiler return slightly up from the very bottom just to conserve height. Plan on having the demand supply/return bosses just below and above the dome to barrel welds (welded to the barrel section). Also adding a mid-tank cross feed line... just because I've seen it in the sketch and what the heck, can't hurt.