Hey, Usually a contributor but need help with something i have never tackled. Baxi Boston h/ex leaking via the seals between the h/ex sections. My question is has anyone out there tackled one of these. My company wants me to change the section seals but how does the damn thing come out. Looks like the boiler has to come out and a plate unscrews from the back then you withdraw the H/ex am i correct?? Either way looks like a (xxxx)difficult job. Any tips