I have a resolute and it has double doors...which should make it generation III but the inside back reads 1979 and manufacturer test date on the back reads Sept. 1980. The doors are not glass but I see that the upper section has metal inserts with 2 screws each. Are the glass inserts available? Can I get full glass doors for better viewing. There is no grate, just a contured bottom and a raised front edge that can be removed for easier ash removal. Should there be a grate to raise the fire? For thorough cleaning is there anything better than steel brushing? Can I pressure wash this baby. Do you have specs like efficiency, burn time, BTU output?