Hi Alex,
Yes getting on the heavy side.
1100 to 1250 glassed and painted would be good. My Oxai Ventura is 1120g painted inc the rudder.
You mentioned waiting for glass cloth @25g for finishing. That will take a lot of resin to fill.
I would sand & seal the balsa first, get 15g cloth and use lots of microballons. See BM3 threads here.
If that gets much heavier you will not have a model that reflects the potential in your design.
Also go to extremes to get light wings and tails to compensate some.