Agreed, nice review!
I've been very happy with mine too, even though I don't have experience with more expensive brands, at least yet.
I feel the same way about the instructions as well. The written assembly sequence part is good, but somewhat awkward as the names of the components aren't shown on the exploded view drawings, only in the text.
Same for the regular vs. fine needle/tip/regulator parts, there's just the numbers. Not a big deal to look them up online, but still. (the medium parts are marked with a not-too-obvious cross after the part number in the parts drawing)
If you've been longing for a guarded regulator, there is one! Guarded regulator, 41-043:

It's originally for the 200NH brush, but the head assembly is the same on the 105/155/360 line as well, so it fits right in. I wonder why this isn't mentioned in the instructions. Looking for one, I sent email to Badger and they replied very quickly and pointed out what part to get.
But there's one catch. That guarded regulator is meant to go with the
medium needle and tip, so you'll need to get them too.
Unfortunately, I'm not aware of a fine guarded regulator offered by Badger, at least looking at exploded view parts maps online.
On a side note, even though the 41-043 regulator will probably fit in with with the fine tip supplied with the brush (cf. fine regulator coupled with a medium tip probably wouldn't), my guess is that it would have a more or less negative effect on the spray pattern.