Thanks. Yes, admittedly, I'm not at all well versed on geometry and I did notice that the tubes seemed more geared towards weight savings in some and aero in others. 

I currently ride a 2011 S-works SL3 with R7000 105 components. Rim brake, obviously. It's on its way out and I'm not that happy about what you get for your money from the LBS these days, so want to build up my own bike. Not just for the cost savings, but also for the learning experience.  I thought I'd go with some frames that were similar to the SL7 but obviously I've missed the mark. I'm obviously many years older now, and I'm wondering if my reach has shortened a bit.  I'm also heavy enough that the weight savings from a very lightweight frame will be wasted on me. I'd rather go with a frame that is a bit heavier but well made and remains stiffer for longer.  I don't race apart from a couple of 160km sportive's per year, so happy to go with a more endurance type bike.

I know this is a very open-ended and question, but if you do have any suggestions about a frame that might be a good match, let me know. Thanks.

Will depend on where you live, but if you're happy with rim brakes, look at branded second hand bikes, you will get the most value out of those. If it comes with shitty wheels, get 60mm carbon ones, you can get a set shipped to you for c.600 usd, or also buy that second hand. Pay attention to the brake track though. Giant TCR, cannondale supersix, there are so many of those for sale and they're so good, you can't go wrong.

Good to know. I recently ordered ONIRII BR-05 calipers and from all appearances look like rebranded ZRace BR-005 calipers.

On Alibaba those are labelled IIIPro. https://www.alibaba.com/product-detail/LS-IIIPRO-Road-Bike-Brake-Calipers_1600550173826.html
I wonder who actually makes that stuff.

I dont remember seeing the usual suspects (velobuild and the likes) offering 130/140. But https://shop.fullspeedahead.com/en/stems/road-gravel/ns-acr-stem does offer 130/140; have you tried aliexpress? Worst case either you get an FSA one, or you botch something. Someone on the forum did a nice hack, routing outside the stem, it looked super clean, cutting one of the spacers for cables to enter the headset area. This means you can half legit run a regular stem and still route internally, I believe.

Looks like a copy of the Wilier Jena

You're right!
Attaching a photo of the Wilier Jena and of the geometry chart.
Note that the GF-003 may be manufactured by SPCycle? (SP-G056). It looks like SPCycle is a bike manufacturer for 10 years (we know that Velobuild does not make frames, they source them and sell them).
https://chinertown.com/index.php?topic=3739.0
https://www.sp-cycle.com/spcycle-2023-new-gravel-frame-all-internal-cables-700x47c-t47-disc-gravel-bicycle-frame-t1000-carbon-gravel-bike-frameset-with-handlebar-p4398298.html

And btw, the GF-002 is the SP-G20.
https://www.sp-cycle.com/factory-direct-sales-2022-new-hidden-inner-cable-disc-gravel-frame-t1000-full-carbon-fiber-gravel-bike-frame-with-aero-handlebar-p3650571.html?currency=USD

So it looks like SPCycle makes the gravel bikes (GF-002 and GF-003) that Velobuild sells.
Note: SPCycle makes handlebars that flare out in the drops. I think VB sells the same handlebars for both road and gravel bikes?

Has anyone bought from SPCycle direct? How about warranty and such?

How did the 34c Schwalbes work out for you on the 168? I got some feedback that 34-35mm actual width would be real tight/rubbing from @kbike and @patliean1 but then there are guys like you where it seems to be fine. Pretty confusing...

my understanding is it wouldn't. Also, it shouldn't.

Does anyone have a good ride review to share on the GF-002?  I have been reading some feedback on YouTube on VB's road bikes that they feel "sluggish" and am wondering if they are similar.

That guy sounds super happy, and his brother has a 168 who's also super happy.

And the owner of the DNR SHREDD paint job on this forum, i think, is also v happy with his.

I've never ridden a gravel bike and i m absolutely useless on a MTB, but I suspect that with the volume of air in the tyres, stiffness differences and the likes must be pretty hard to discern? So it's probably down to components, geometry and sizing quite a bit. Geometry must matter a great deal because a slack touring gravel is going to ride v different from an aggressive CX bike (I can imagine long moments of solitude going down rocky trails on a CX frame).

For me it rides a little rougher than my 2019 Aeroad CF SL but I had 28mm tyres on there and on the velobuild its 25mm and a blank carbon saddle.

tan sidewall tyres once these contis are done.

Rim brake? interesting choice! You don't have access to the glut of second hand rim brake bikes everybody is trying to offload? The 25 vs 28mm can alone probably explain the ride difference. Would be curious to hear your thoughts on ride quality difference controlling for contact points, if you ever feel like running a semi scientific experiment.

FYI, Conti GP 5000 exist in "transparent", from memory, which is a dark shade on tan. I have a pair of 25.