Bad to hear that QR won't check through. I'm flying SYD-BKK-DOH-MAN with TG/QR in J in a months time. QR and TG have codeshare agreements so I'm hoping that interlining is a go as I don't particularly want to go landside (and pay departure tax) just to re-check bags in BKK.
I'll let you know how I go on.