Odd that... I guess one of the drawbacks of going with plans as opposed to a kit?   

On the 'lines drawings' portion of the EP's web page here there's a dimension from the bow to where that frame is positioned, but it's too blurry for me to read what the numbers should be telling us.

Yet it's clear enough there that frame serves to both add support for the daggerboard trunk at its aft end as well as provide support for the midship seat so perhaps not such A Big Deal after all?

What does the build manual tell you about how the daggerboard trunk is bonded to that frame? That may be enough to guide your progress.

Still, lacking input from other forumites, I'd give CLC's excellent tech support crew a call on Monday for their insights.

Yeah, figured the plans would cover this kind of thing.

That drawing is at least a helpful clue. Looks like 52-1/4",  I'll check that against the rough location I have found from the mortises for the trunk.

Good callout on giving the tech support a call. I forget that they're available.

Thanks!

The mortises for the tabs on the bulkhead define where the bulkhead goes. It's like a plastic model kit.

Laszlo