ultrasonic cleaner for carbs, So I bought one, who has used them before? Options

[stugray]

I am rebuilding some dual webers and want them like new.
So I bought a Harbor Freight 2.5L ultrasonic cleaner.

I am hoping it is big enough to fit the carb body in there as well as all the pieces.

So who has used these for carbs before?
I read on a clock repair forum that US cleaners can "pit" brass parts if left in too long.
Has anyone ever seen this using them for carb jets, tubes, etc?
How long should I let it run for and what cleaning fluid does everyone use?

At work we use Isopropyl alcohol, but it is kind of hard to find 99% IPA in gallon jugs without paying for hazardous shipping.

SO.... I was thinking of using "Denatured alcohol" which is just ethanol with a little methanol added so people wont drink it.

I can get that at HD in gallon jugs.

Next question: should I also do the soda blasting to get the carbs extra nice looking? Outside only I imagine ;-)
Do people take any precautions to make sure we dont blast inside any delicate holes or passages?

Thoughts?

Stu