This may well be an interesting build. Thanks for decent photos. Sounds silly to ask but what glue will you use? I have tried many kinds and like a longer set time than some out there. I am betting that you have a bunch of clamps too.
I will keep my eye on this thread since speaker building has been great over the years for me.

The tornado sirens ran me out of the shop yesterday before I was ready to stop but I got back to it today.



The crossover board occupies most of the bottom, I’m still working out a scheme to attach it before glue up so I don’t have to screw it down blind.



Crossovers done and wired. And a quick test to make certain they actually work. They do, now it’s time to glue up the cabinets
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 I continue interest with your project. Part of the reason is the build quality and thought that you have put into it. I am at kinda the same point with a baffle not glued in yet, and thought the same as you with the crossover, but I can get mine in through the port hole, just barely. The shop isn't even close to cozy temp wise, so I gotta wait it out for some time to come.

Don't get me started on open time! Some glues are faster than my hands. I even tend to use an overabundance of glue, thinking that it might get me an edge but instead it just gives me a mess.
I am like you walking round my workbench looking and trying to capitalize off my time for a glue up knowing full well what the price of forgetting something can turn out to be.
I agree with the thinking about the dowel, as I have considered as an afterthought this idea for my DNA2 build. Much better to get it right before finishing the cabinet. In my case, I have considered using a pipe stanchion on each inside wall and then figuring the rest out as I go along.

It doesn't always work out, but sometimes I use my workbench as part of the clamping process. It is really flat and if the cabinet dimensions agree with it then I can lay the speaker cabinet sideways on the bench. In some cases, everything falls into place, and I will even be able to clamp the whole cabinet at once. Also there have been times where a stack of panels on top/side of the speakers being clamped are placed so that the pressure of the clamp is spread across a wider area. But you already know no one can have enough clamps!

Here's a thought. I don't know how you might be heating your shop, but I have found that in spite of the idea that I like radiant heat, it dries the glue even faster. Yup, you get even less open time. Kind cool for some finish work though.

More progress aided by warmer weather:
1/2” roundover on the face edges, I was not prepared for the prodigious amount of mdf dust and spent quite a bit of time vacuuming the work space.



First veneering steps, bottom then back using heat lock glue.



And routing the back openings with a down cut spiral bit.



I’m making a riser for the next part where the cabinet will sit face up, the veneer will wrap around and I need clearance for the overlap along the back edges.

Edward,

Nice work!!! I really like the veneer, and look forward to seeing the end results.

Best,

Geno

Rubio Monocoat Pure, coating #1:

 That grain and the way that you laid it out stopped me dead. That is really impressive work, and no it wouldn't be if you didn't get it laid out the way you did, it would be about half as good.
How much finish do you plan to use?

They’re still a work in progress, the Rubio Monocoat is not even in a few places. The remedy (according to the Rubio help desk) is to cure them and then scuff thoroughly with a red pad (approx 320 grit) and apply a new coat. Unknown to me, African Anegre is likely a softwood and the oil penetrates unevenly. I’ll busy myself building the stands while I wait.

Those look professionally done, Ed. Good work.

Randy