Is there a single plate to use so I can quickly go from 561 bhdv monopod, zacuto rapid fire, standard tripod, steadicam merlin?

The 561 bhdv has a 501 pl system and the rapid fire came with 394 quick release. Is there a way to quick release to these systems?

You want the 577:

Manfrotto | 577 Rapid Connect Adapter with Sliding | 577 | B&H

Will the 394 quick release that came on the zacuto rapid fire work on the 577 or do I need to take off 394 and replace with 577....if that works.

I'm not sure. I have the 357 on my gear, but I know the 577 fits your tripod.

It's easy enough to test. Does the plate from the tripod fit on your shoulder rig and vice versa? If not, you can probably replace the 394 with the 577.

thanks for the help John

Joshua, if u r a wedding shooter i suggest Manfrotto 394.. the one that comes with the rapid. I tired many things alr and this is the best fit. the only one that cant work out is the merlin. It cant handle the off balance of the QR adapter. Only choice is to have a special QR of its own.

Manfrotto | 394 Low Profile Quick Release Adapter with | 394

giottos m621 works with the manfrotto 357 plates... and it's cheaper.