Redleg, the fins should be vertical, NOT on a cant. Before you glue, figure out a way to hold the fuselage, tailbooms and the tailplane in alignment. It's quite tricky unless you have five hands & lots of patience. Try cardboard formers or Lego bricks if you can get hold of any. Then, when it's all dry, be prepared to slap on lots of filler under the wings. NOTHING is well located or easy to align.
But when you get it right, it's a nice model!
P.S. Did I mention that you need LOTS of weight in the nose?
Pete