rmnka447, on 2019-September-23, 13:24, said:
I think North's proper bid is 3 ♦ preemptive. Then South can drive the auction from there.
I agree as well.
The thing about Cappelletti is that you have two ways to show diamonds - you can jump to 3♦, or you can go through the 2♣ response. If you are not goimg to use 3♦ as a preempt, you may as well use 2♣ as just showing a six-card major and bid 3m directly with a minor (Multi-Landy style).
And yes, given your methods, I respond 2NT.