SSCHERIN, I have built two of these over the years and both have flown scale like with the Saito 45 you have. It is a very light kit when finished. I had the Cowl and the wheel pants just like you, though I did take the pants off for grass field flying.
I mounted two Hitec wing servos iin the last build, made for a real easy aileron set up and for grins added flaparons via Airtronics RD8000. Talk about slowing down
I made several copies of the windscreen design making each a little bit larger as I went till I got a good fit. Carfully glued and small screwed the windscreen to the frame. Thin soft plastic was the trick, plus the slightly larger size.