The crack in the boiler is a easy fix . Just v the crack like you would do a peace of still to weld and use a high temp epoxy it works good The heater blocks are a different story its hard to find the wright type of carbon . It took me about a year to find some I bought all of it I have plenty of it left if you need some . It is very hard to get electrode wires through the boiler and seal back wright but if I can do it any one can.