Islandflyer.... I believe you will be happily rewarded with the combination you have chosen
One suggestion...... perhaps consider HS-80/81/85 type servos for the throttle/retract valve. Just a way of keeping an extra ounce or two off of the plane.
Also, maybe consider an integral jett spinner. You will need a good aluminum spinner anyway. The integral spinner actually replaces the prop drive on the front of the engine, and becomes part of the engine... little chance for it to come lose. Plus the bullet shape kinda looks cool [&:]
Where on the islands do you fly ?
Bob