sanwu laser beam expander

Hello
i wanted to ask if some of you guys have experience with the sanwu laser expander
https://www.sanwulasers.org/product/x3beamexpander

it expands the beam 3 times with it
but does this also mean that the beam will be watered down (more transparent) ?
so when looking at the side of the beam it will be not so visible anymore?

also does the expander works on the sanwu laser with the head caps attached?

https://www.sanwulasers.org/product/attackcap
(i would really want to know if this would attach to the crown head cap)

thank you in advance