I'll have more to say about this in the next few days, but I want to get this out there for others who are interested in buying from First-Class Carbon Fiber Store (
https://www.aliexpress.com/store/1102993497) and associated storefronts, RF Ultra Extreme Carbon and Mirror Carbon, on AliExpress.
I bought a frame from First-Class Carbon 80 days ago and the frame has never been delivered. Since then, other buyers on this forum have purchased frames from F-C and they have received their frames, including another USA buyer who got his frame in only 30 days.
F-C has not (yet) taken any responsibility for my failed transaction but has spent significant energy telling me to 'just be patient' or trying to deflect responsibility.
Suffice it to say I cannot recommend First-Class Carbon Fiber Store at this time. Maybe F-C will still make things right for me, and if they do, I'll be sure to update the forum with that info.
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Final edit Feb-22-2025: My Ostro frame was eventually delivered after ~75 days in transit and 90 days after order. See page 19 for more info.