You would definitely need a long chisel because there is no way both my shoulders are fitting in the top burn chamber. once the nozzle and refractory were in place I would pull the tape off tubes and light fire. The heat will remove the plastic tubes in short order. do you have phone number to call for nozzle? I also need the refractory for lower chamber. It just broke in 2 yesterday while cleaning out ashes. Good timing for refractories I guess.