My new woodgun has a 1.5" fitting on top and a 0.5" fitting for the gauge. Can I put a 4 way cross on the 1.5" and then put an aquastat on either side to control to seperate pumps and have the supply going straight through the cross. One pump is for the 160 degree thermic bypass valve on the return and the other is the main circ. pump feeding the 5 zone valves. After the thermic valve opens, it's pump will help pull the water into the return of the boiler. Does this all sound OK. The wood gun has one 1.5" on top, one 1/2" on top and two 1.5" near the bottom. The boiler has to have minimum 160 degree return water, what should the aquastats be set to? There is a mixing valve for in floor heat before the main pump. Thanks