Geoffers - some (very) rough 135 figures for you.
I reckon you should be able to get 2 pilots, 4 pax (all 90kgs) & 300kgs fuel (200 kg p.h.). Some extra goodies included, another 100kgs for those I'm not sure about!
With ECD seriously considering an increased MAUW to 2900 ish (extra 65kgs), and other weight reduction measures, you could have a little more to play with - and all at +40 deg (Clear Area).