Hi & Happy New Year!
The ZN and TS versions have different sweepback so I'd advise checking with a ZN Oxalys owner! Sounds about right tho'
I've been told that ZN specify, 245-265mm FORWARD of the T/E of the wing (which sounds like approx where you've got it) so if you're close you should be safe. (you could also ballast for test-flying and adjust to personal preference).
Regards, Bill.