Nice engine but in my opinion the A50-16L is a better match. Reason: even with the A50-16L the plane tends to be tail-heavy. The Hacker weighs 501 grams.

I'm using the Hacker and have the lipo at the most aft-position end built in the receiver in the backside of the fuselage. Am using mini-servo's (S9650, 29 gram) in the tail.

When using that Scorpion Engine, which is 353 grams, it is not unlikely one will need lead to get the CG correct.

Also the Scorpion is high-KV, which means a smaller prop. The wind has a thin wing profile and floats really good. The breaking effect of a 16x12 prop is a lot less than an 18x12.

I wouldn't go with this specific scorpion engine. I think the Hacker is a better match.