The Streak with a much longer stabilizer span is a delight. We call it the "Doodle Streak" because Bill Netzband came up with the concept of a model with higher aspect ratio than the wing. I asked him to figure the size for the new tail, he did and it works a treat! The fuselage is left stock as is the wing.
For the Saito 30 I needed to shorten the nose 3/4" and put the tank on the inside of the nose. That worked fantastic, as the engine becomes sensitive to speed without sensitivity to fuel draw. Send it off dead lean, it richens up in level flight, but leans back out in maneuvers. My famous 8/4/8 break! Ask Proparc about this.