The blue Laser has got a new engine, a YS 160. The Hatori 828 pipe has a much larger opening so the YS header does not fit. I fixed that with a silicone tube over the header which gave a very tight fit. The engine mount is new (Hyde mount from Central Hobbies) and I have redone the cowling fasteners which turned out lighter and easier to remove.
AEROWOLD
F3A aerobatics