Seeking advice on DF700 XL connectors for large table

[Andersrl]

I am building a very large table (144cm wide x 300cm top; see picture). The top is made up of 2 book-matched white oak planks of 71.5 cm width. The base is made of 2 coopered white oak arcs, one at each end. Since the table is so large, I have designed it to break down into 4 pieces: the 2 matched slabs of the top and the two coopered arcs of the base. I am interested in advice about edge joining the top halves with DF700 XL connectors.  With the underside of the top as the reference surface, I'm thinking of using  3 SV-DB D14/32 connectors interspersed with 5 or so 14x140 dominos unglued in loose mortises.  Could I use more SV-DB D14/32 connectors, with the horizontal mortises drilled loose and the vertical mortises drilled tight? 

I would also appreciate your advice about how best to join the top to the coopered bases with XL connectors in a way that allows for seasonal expansion of the top.  I am thinking of using SV-AB D14/32 connectors, one on each side of the center of the base arc (one for each half of the top), with the spreader end mortised into the top and the locknut end drilled into the base.  At the outer edges of the base arcs, I would attach some Z clips.
[attachimg=1]

Thank you!

Adding a top-down sketch view of table and bases, to give a better idea of where XL connectors would go.
View attachment 2

 

[squall_line]

My gut tells me that the "safest" way to connect the top to the base is to create a subframe on each base and attach that to the top using Z-clips.  That said, I'm also not a furniture builder, so take that for what it's worth.

As far as connecting the top, I would keep in mind that you should register ALL of the domino cuts on your top from the top face, to ensure the top edge align rather than the bottom face.  Obviously you will put the connector mortises in the bottom face of the table, but the reference edge for the horizontal mortises should be the show face unless you really want to re-sand the top.