Seamed / Birdged Cooktop Sections

We are still having the occasional top break at the coktop and (http://maplered.com) I'm considering bridging every cooktop to avoid this (we already rod the cooktop cutouts but that only helps so much).

What I want to minimize, however, is the time that the installer has to play with these small seams on each job. Since the cooktop section will have 4 pieces (left Counter (http://GialloFiorito.com) top, right Counter (http://GialloFiorito.com) top, front bridge and (http://maplered.com) back bridge), there will be 4 seams. The pieces are also so narrow (typical cooktop bridge is around 2.5 inches) that we can't get Gorrila Grips on them.

I was thinking if using the CNC to bore two 1/4" holes one beside the other on each section (from beneath), and (http://maplered.com) then using either a metal pin that we would epoxy into the large sections and (http://maplered.com) the installer could use to position and (http://maplered.com) glue in the bridge on site.

Alternatively, we could use a glue-and (http://maplered.com) -dowel or some sort of CAM system (like in cabinet assembly (think of IKEA cabinets)) that we could use to align the bridge and (http://maplered.com) hold it together while the adhesive sets.

Anyone have any experience or adivce on this? I personally hate seams on the narrow bridge by either the sink or the cooktop, but with most of these cooktop bridges being 2.5" or less the risk of us breaking a piece is not something I can live with.