Haha, sorry guys - it's just a few things from watching Russ' videos and from the bit of research I've done!
Leo, that's an awesome looking machine! You obviously went for the larger power tube, a 130 max I assume looking at the housing extension. Mine is just 100w max (which has a real world usage of 80-85) which is a W2 RECI tube. I may upgrade it myself later at tube replacement time should I find a want for more power.
The little square meter in the middle is the mA meter that I'll install on the machine before I ever power up the tube. I want to be able to keep the current in the recommended range so that I can have the longest and safest tube life possible. Percentages on the controller mean absolutely nothing if you don't know what current and wattage they are producing!
The gauge on the right is a laser power meter that I can measure the wattage of the beam. I will use this to find out what wattage I am producing at what % controller setting. This is also a great diagnostic tool to determine loss across a mirror to see if there is a problem with 1 or more mirrors or alignment. For instance, I can measure the power leaving the tube, after mirror 1, after mirror 2, after mirror 3 (laser head without lens), and after the lens to determine how much power is being lost along the way.
The glasses are laser blocking safety glasses as I intend to disable the door switch to that I can easily align mirrors and check operation. I used to wear glasses and they will block most stray reflections BUT I had corrective surgery and no longer need them so I figured I'd better own at least one item of PPE in my shop!!
Lastly is the Cermark - After ordering this I found a comparable product called Laser Bond 100 (on the RDWorks board Leo) that is a little bit less expensive. I ordered the aerosol can to use for getting the hang of it in the beginning, then the liquid is diluted and air brushed when used. Those 2 bottles were about $400...... but they will do quite a few projects! This is for lasering marks on metal which cannot be done with a co2 laser alone. You apply this product and dry (air or oven) and then laser and it will leave a very nice black marking that cannot be washed off!! I will use this for the stainless steel drinkware that I sell as well as for metal artwork from the CNC plasma.
Happy Lasering! I can't wait for the machine to arrive!!!