Yes Nick, put me down for a call

Now that I've had the time to at least read the first page........
How does the "removal of a single chip" come into play?
Are the blinds different?
Thanks all
NoMat you're missing a small but very big detail in the scope of your question.
It isn't the "removal of a single chip". That's a misinterpretation that seems to happen because the rules need serious rewording help.
What your question should say is: How does the "removal of a single
OVERSIZED chip" come into play? The word oversized here is very important.
So in your scenario, the BB has added a 1,000 chip to previous chips of 300. If you remove the 1,000 chip, there is not enough chips in the pot to call the 800 bet.
The removal of the single OVERSIZED chip can be better illustrated by this scenario: Blinds are 150-300
UTG raises to 600
UTG+1 raises 1200
Cutoff puts in two 1,000 chips - this is a call. Why? Because when you remove one of the two oversized chips, the remaining chip is not enough to call. This falls under the multiple same denomination chip rule.
Conversely
Cuttoff put in two 500 chips and one 1,000 chip - this is a raise. Why? All the chips are oversized. But if you remove one 500 chip, there is enough to call 1,200. Therefore the additional 500 chip constitutes a raise.