I understood that from your original post, [8D] I just wanted to reiterate that the 1.60 is enough engine since there was some talk about what was needed to get the plane to perform well. The Moki 1.80 is a fuel guzzling glow engine. I did not use a pump on my 1.60. I only put a few flights on it but it did not seem to need a pump to get the fuel from the tank to the engine. I used a Bison Pitts muffler on mine and it worked great. I dont see why the slimline would not work just fine as well.

I thought the plane flew nicely. I think you will like it with the 1.60.