Yeah, that's tough - plus if it's not just cosmetic, you won't have much to say when/if something happens.
I kind of wish I had found the Sequel shop ahead of ordering directly from TanTan - the cockpit is better and it sounds like shipping was included for you, which I had to pay separate for.
Some of the QC issues with the TT-X38:
- Small (like, half mm) play in top headset seat.
- Internal routing channels were pretty rough, made routing the thick brake hoses a smidge difficult, but I got it sorted.
- BB interface was pretty gnarly, tbh - had to use a file and clean out some paint in the threads as well as fix a really clear gouge that spanned 3 threads and threatened the seat.