The 8 oz. tank should be plenty of fuel for a .70 four stroke. They don't use much fuel and 1/2 pound of fuel up front is enough additional weight in the nose. However, there is plenty of room up there for just about any size tank you want to put in.

I put a Magnum .91 4S in mine and still plan on using the 8 oz. tank. With the 23 ounce engine and heavier GP .60 - 1.20 motor mount, I ended up with two servos in the tail and a 6V NiCad battery pack in the tail to balance the plane with no additional weight.

With the .70, you could most likely get away with the lighter GP .45-.70 engine mount.

I'll try to post some pictures and other information later today. Too windy here in San Antonio to do a test flight and next weekends weather forecast isn't very promising either, so don't know when I'll be able to report on the planes performance in the air.

More to follow, good luch with your plane
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