We are newbies to SC, but have been using an FSL 120w CNC laser for about 4 years, relatively trouble free. After 4 years, the tube finally gave out slowly and we just purchased a new 120w tube from GoldenSign in Chino, CA. In the process, we have learned that there are many opinions about tube and PS matching. We currently are operating with a 150w PS. So we are wondering what the community thinks. We want to cut relatively quickly, but preserve the life of the equipment, too. We do a lot of wood cutting, and want to be able to cut through 1/2" Baltic Birch, although our mainstays are 1/4" and .20". 1/2" birch may be an unachievable goal. Additionally, the PS is running at a constant 42ma. That seems high. Thanks in advance for your advice.