Thought I should leave this here in case anyone doesn't check the Complete Guide to the QR Fleet wiki thread.
QR operates 2 main configurations, 42J and 24J. Refitted planes add an extra row where they can, while the ones that have yet to be refitted still operate entirely on the 333 configuration. Some routes are still being served by these planes (with the 333 config).
The 333 config can't be found on SeatGuru anymore (
here) but all you need to do to figure out where you're seating is to minus one seat from the rows that have 4 seats in the middle.
Hoping for a 333 to serve the KUL-DOH route this Wednesday, in the past week it has been served 5/7 days by those instead of the 343 configurations, fingers crossed!