Hey Milton. My model is the Yatsenko Shark with Retro 61LS running FAI fuel.63oz. This plane got a couple if nicknames( Snow White,Casper,Ghost) you get the gist.
This model is the easiest to fly, has the best corner but is hard for me to fly well 10 flights in a row. i started flying this model one week prior to going to the Nat's as my all composite Vacuum bagged Impact Master 3 was not ready to go. the Impact Master was completed and flown but not painted the week prior to the Nat's. Impact Master 2 was flown this spring but developed a yawing on very hard corners(remember Gean) like that so it was left home.
Here are photos of the Shark, Impact Master 2 and 3