Jody, the FAA has issued an SAIB on the repair of Lycoming engines, saying, "While independent repair shops have successfully repaired cylinders, there are many repair stations in the aviation industry that have talented and knowledgeable personnel who are performing a much needed service in re...

I was wondering the same thing. I am looking for a TIG welder for homebuilt airplane work and seriously consider the Square TIG 175. But I called the rep and he recommended the Precision TIG 225 because it has TIG pulse, though he acknowledges that a lot of people just pulse with the foot pedal. Wha...