[EDIT - replied to the wrong message, this is concerning 2xM22 as center]
There are a lot of threads on this - even more of them discuss using one or two M2s as centers.
The "mains as center" crowd also tends to advocate vertical centers rather than horizontal. I found a single horizontal center mucked up the imaging but didn't get a chance to try a symmetrical pair, that should work better.
Suggest you start a new thread for this but do search the archives back a year or so first. Remember that we spell "center" / "centre" differently depending on US or Canada
