Really?  No complaints other than the brusque attitude and continual underestimation of shipment dates.

Sorry to hear that. But, yeah, for me, really, no complaints. Sounds like I had a much better experience, though, with shipping and follow-up. I guess I should add the disclaimer, YMMV.

Your build looks fantastic!

I had a ton of issues with my build, but I chalked most of those up to my inexperience with bike building. I'd say the biggest issues I had would be with the fork/front wheel through axle fit and head tube/headset bearing fit. For both of those, I had to throw in the towel and go to my LBS. About $5 worth of spacers and washers later, it's all good.

I tried to purchase this frame on Aliexpress back in November. After I already paid for it, the TanTan rep sent me an email saying it was out of stock and issued a refund after we had a short back and forth over other models that were available. They did say, at the time, that they would be available this month. Not sure that helps, but I'd reach out to whichever TanTan rep is currently working on Aliexpress to doublecheck availability before purchasing.

As for TanTan and spare parts, yeah, i'm not sure how many years from now you're anticipating having to get a spare part, but I purchased my TanTan frame back in November and as recently as a week ago, Lisa who I bought the frame from, is still answering emails and sending parts as requested. I had a random screw fall out which she replaced free of charge and I also purchased a spare rear deraileur hangar. I've asked about other parts they might have on hand and have had 0 issues getting answers.

I can't speak for the TT-X3 or BB386 specifically, but as far as TanTan frame quality goes, I've had 0 issues with the pressfit bottom bracket on my frame. It's a BB86 and I've recently switched out the Shimano 24mm BB86 threaded pressfit for a 29mm DUB pressfit. Alignment and tolerances are excellent, both installs were super easy, and no creaking from either.

Hi
Did anyone here had problems with a play in the headset?

1) Check your steerer tube length. You may not have left enough space to compress the headset.
2) Check your compression ring to make sure it's seated properly.
3) Check your compression plug to see if it's slipping.
4) If you're locking up your steering but still getting play in your headset, check to see if you have too much space between your top cover and compression ring.

For 1, I just used a spacer above the stem. For 2, the compression ring was seating fine most of the time, but it was frustrating enough that I got a new headset with a different compression ring. For 3, I had to use a different compression plug.

When all those were taken care of, I started locking up the steering trying to tighten the headset, so it was progress at least. My LBS sold me some spacers that sit above the compression ring. That finally did the trick.

Unfortunately, Wheels MFG doesn't make a thread together press fit for Sram DUB, one that fits a BB86/92 bottom bracket anyway. Here's what they offer.

https://wheelsmfg.com/bottom-brackets/bb86-92/bb86-to-29mm-dub-compatible-kit-for-pressfit-86-92-bottom-bracket-with-flanged-dual-row-black-oxide-sealed-bearings.html

They have an upgraded version of the same set-up for $137. It's a shame, but I'm converting over to a power meter that requires Sram DUB, so I'm switching out my Wheels MFG threaded press fit for this Wheels MFG Sram DUB set up. Should have that completed in time for a weekend ride, so I'll let you know how it goes.

While on the topic or power meters and cranks. I have been thinking of going to spider based power. Any good Chinese options for 24mm cranks? I'm running bb86 so I don't want to switch to 30mm cranks. Been trying to hunt down a skypivot crankset without any luck. It seems like rotor is the only option but fairly expensive for what it is.

https://xcadey.com/product/xpower-power-meter-crank/

Xcadey was a little slow to get back to me, but once they did, they were pretty responsive. I was able to confirm that this spider/crank combo fits a BB86 24mm spindle. They even updated the page so that you can now choose your crank length.

I'm going to bail on this set-up. Seems like Sigeyi keeps releasing firmware updates that introduce more issues than they fix. I'm not keen on switching to DUB in the first place. Looking at the Xcadey spider/crank set-up that is capable of using the 24mm BB86, but the company has been completely unresponsive.

I'm may do the single crank after all, or save my pennies for a major brand spider/crank.

Thanks everybody!

The top cap? 2ish Nm. Didn't take much to tighten down the head set once I got everything sorted out.