I didn't know they made a smaller one.
Mine's definitly a .40.
CG for the .40 size is 3/16" back from the leading edge of the wing according to the email I just got from Midwest.
I wonder why your aileron difflection is different for up vs. down. you much not have good 90 degree angles somewhere.

Do yourself a favor. Get a cheap USB trasnmitter box and download the fms simulator. Lots of online hobby stores will sell the esky transmitter w/ USB connection to run w/ FMS.
That will save you LOTS of greif in flying and loosing orientation. You should be able to get that for less than $50 online or ebay. search RC simulator on ebay.
Here is a guy that has those:
http://www.jaghobbies.com/images/rc_.../usb_sim_2.jpg
Look for that item on this page
http://www.jaghobbies.com/rc_planes/ek1h-e016a_cart.htm