Aint that borewash problem on greys a bit inflated? Or does it take just a little over fueling for it to happen?

I remember it was a hot topic back in the nineties. I ran greys back in 98 on a stage2 conversion without any problems at all.

Consumed less fuel than my current Bayjoo conversion.
It was checked over with a lambda meter though so thats perhaps why it ran fine without problems.