This is probably not going to be a popular opinion on this forum, but I would buy a used Quarq.  I have had two Chinese power meters, one stopped reading cadence (no power without cadence) and the other broke during a rainy 600k.  The Magene seems to have good reviews and seems like an overall solid product, but I have 3 Quarqs, and I purchased each one used for less than the price of a new Magene.  Between my Quarqs, I have over 20,000 miles and have had zero issues.  2 of them are currently on T47x85.5 bikes-- no issues there either.

As an update for this situation: first I received a proposal for a $50 discount if I accepted the frame with the terrible paint job, which is hilarious considering I paid 8x more for the specific custom paint, so I refused.

So the conclusion: since I still want the paint I requested and the Chinese holidays are coming soon, they will restart production again, but now the frame won't get shipped until half of March.
Keep in mind I paid at the end of November...

Also apparently they now do not paint the plastic lid/cover anymore, since they can't guarantee it will close correctly.
Kinda weird to be honest, but I accepted to get the lid in black now (initially I asked and got an OK for a painted lid).
I didn't want to overcomplicate things, since they're already struggling with basic requests.

I'm kinda mad cause I had all the parts coming in now and was ready to build it up for the first race at the very beginning of March, but now I'll have to wait almost 3 months just to start building it....

At this point I just hope they finally understood what I actually requested.

For the other people that have already asked Tantan for a paint: you need to talk to them like you would with toddlers or a bot like chatGPT.

Basically you have to make sure they get all the instructions point by point, because if there's anything you've left for granted, there's a chance they might fuck it up unfortunately.

Trusting your life to some random aliexpress seller pushing 800g frames is a gamble i don't feel comfortable taking. Imagine it breaks from under you. While you heal from your wounds and remortgage your house to pay for the medical bills, you're like "maybe i should have bought a frame that was 100g heavier, maybe it wouldn't have snapped".
Then again, i'm over 80kg, so i'm not the target audience.
But it's still scary to me. You just dont know who you're buying from.