I am collecting parts to plumb a TARM solo 60 to 370 gallon pressurized tanks. I have not purchased any plumbing fittings yet and am wondering if I should purchase a Termovar loading unit or a laddomat. If I understand what I am doing this unit will go between the boiler and the parrallel plumbed hot water storage tanks. I understand the TLU costs more ,but Ithink it has a variable speed pump. My boiler is oversized for my heat load if that matters. Any input would be appreciated.