I am new to Laser engraving. Used a Universal at school where I work. Now I want to purchase one for home. I've found 2 used machines by 24 x 12 work area. Universal M300 50 watt and an Epolog mini 24. both in reasonable good condition. I'm having a difficult time making up my mind. Looking for the pros and cons of each machine so I can make a decision. Need advise. Dave Seaver