It is a bit fiddly getting it around the brake pipe
It's easier with the wheel off though.
Not had to take the caliper off but that would make it very easy.
I'd recommend getting the third fixing point sorted.............tapping of the swingarm.
Again, with the wheel out, it's not too difficult. I use a M5 so the hole can be drilled and tapped with the hugger in place just to make sure the hole is in the right place.
You don't need to go into far 10mm or so.