6 PIN 12 STRING BRIDGE (shared pin method)

[Abstraction]

Thanks Nick. This is a superb tutorial. Only one on internet I've seen.
My research suggests:
PROS
+ String break angle improved.
+ Fewer holes through the bridge, top and bridgeplate.
+ The bridge can be smaller so more of top to resonate. Some believe there is tone improvement.
+ Uncluttered: Often 12 pin bridges have strings nudging neighbouring pins. A little congested.
+ "Can customise the little gap between the octave/unisons , where as the 12 pin method dictates otherwise."

CONS
- Less gluing area with greater tension. Increased risk of bellying, bridge bulging.
- Changing strings means loosening two. Awkward for live performances.
- "It also means that both strings need to be carefully slotted and ramped to set the spacing (or you need a slotted saddle)."

So I'm thinking of increasing the bridge size to address risk of bullying or bridge bulging.

I'm after advice on how much to increase. Minimum. Too much I reduce some of the advantages. Width? Depth? Thickness? Not necessary?

This is image of my grandson's chosen bridge shape superimposed over my 12-string dreadnought plan (and my soundboard.) Below options.
This is just depth:

Width and depth

received_1213287452993962.jpeg (294.96 KiB) Viewed 851 times

Just depth

received_588049701066677.jpeg (329.11 KiB) Viewed 851 times

Oh. It changed the order and put the six string size at the bottom.

152x37.5mm = 6 string dimensions
152x42mm = more depth
172x47.5mm = depth and width