RE: YS 63FZ-S or saito 72
recen tly I sold my ys.53 and it screamed..and it was more powerful than an y 72..sooooo a ys 63 is far more powerful than the 72 if thats all you want..I love satio's too.they are extremely reliable and have good output ..I sold mine as it was too small.I am in the process of finishing my first gasser..