Good work so far. The engine mount tool might be my favorite one in my whole arsenal. It's too bad they are not manufactured anymore and new old stock will only last so long.
On the issue of right thrust: add it. On a 3-channel airplane, it's a necessity, at least in my eyes. When doing a maneuver such as a touch and go, the torque applied by increasing the throttle on climbout tends to twist the airplane in the opposite direction; you then have to put in some rudder and this results in the airplane flying sideways for a bit. Normally ailerons and rudder working together can counter it just fine, but in this case the responsibility falls entirely on the rudder's shoulders. Add a bit of wind and/or turbulence and a slow crabbing plane can easily become a pile of splinters. (i've seen it happen) I would recommend 2 degrees right on the engine; that would probably be just about perfect.
I would also recommend not permanently mounting the cowl cheeks. Engines have to come off from time to time for occasional maintenance like bearing changes and internal cleaning, and if you have the mounting nuts cocooned in the cowl this makes the task a lot harder. To prevent cutting holes in the cheeks and to de-encumber the task significantly you can mount them using snap fasteners, like the type that some shirts use. The seam will make it look like an actual cowling and this has the added benefit of the cowl cheeks popping off harmlessly if they hit the ground for any reason instead of potentially sustaining damage.
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I may need to look at building a two piece wing. I haven't run across this mod but really haven't looked yet. 
