What advantage is there in a 15w diode v 3.5w diode

[beamer3.6 (L H)]

The power of air assist

I added air assist to my 3.5w diode laser with the hope that it would cut perhaps 2mm wood. I initially borrowed a fellow forum members 3d printer skills to obtain an adapter to fit the laser but this delivered the airflow a little too high and it was so noisy due to the diameter of the inlet. So I needed to change the noise issue and so I used a metal drinking straw which I feel directs the air better and increases the psi(?) as it’s a smaller outlet (5mm instead of 10mm). The noise is now g…

The ply I use is just hobby ply which is pre cut into 30x18 rectangles. 4mm thick.