Anyone have one of these? (Sanwu Red Guardian)

Hello humans / giant telepathic spiders.

I'm new here; I'm looking to pick up my first real laser after I save up for it.

I have my eye on this exquisite Sanwu laser, specifically the 3W version, and I'm wondering if anyone has one because I want to ask a few questions about it.

I really like its small pocket size, but I'm concerned it won't fit comfortably in my average-to-above-average sized male hands.

Noob question, but I can't seem to find information on this: does the beam expander fit on top of the lens or replace it? I want to go for the G7 lens since all of you guys recommend it so highly, though I'm hoping the lens is also suitable for burning.

The description says:
So that just means I have to remove oxidation from it and take care not to drop it right?

How do you guys feel about this particular Eagle Pair for protection from the blue laser?

Lastly, what the heck is an attack head? Is it just an aesthetic thing? What does it do to the beam?

I love you.