I would say that with the G20/23 set up you could clip at least 2 rib bays off of each wing and not notice any problem. The stock wing has so much lift that to me it's only good as a trainer. With the clipped wings the plane would be a lot of fun to fly and would do aerobatics better. Besides, you don't need all that wing for a tow plane either.

Bob Cox
SPA 374
Miami, FL