I know a reasonable guy that has both Whitfield Traditions T300P and a Whitfield wh 75443, wp3 advantage insert that he wants to sell with piping and install for around 750-1000 dollars. I have looked at manuals on both and have to replace the controls on the INS, so leaning towards the T300P which only needs a sensor unit. The question is will that unit install on a masonry hearth, (russian style brick) ? Whatcha think about both the application and value? I'm Dutch-Irish and genetically required to obtain a good deal.