Hmmm... The ECJ is still calling the shots in that part of the UK. And, from what was said on the radio earlier, the 'red channel' is for all goods at risk of travelling on to the EU. Well, all goods that reach NI are bound to have some risk of travelling on to the RoI so what percentage actually goes through without EU demanded checks ?
And that's before the experts have gone over it with a fine tooth comb. I don't have much confidence with this if implemented.