I agree for a case this big you probably only want one sound source (beads also had over but you probably won't use it often if you are using beads for effects)

I don't know enough about pizza but the twin waves has two oscillators that can fm and am each other, and also double as LFO if needed.

However, without the quadrax you are going to be stuck using the o_c for envelopes which is a shame as it has lots to offer otherwise.

If you do put the quadrax back you can use one of its channels to fm the pizza

One option might be too go to a 6u case 😅