Bret,
The only modifacation I did was the tail wheel.

As far as the landing gear,some reinforcing is okay but don't reinforce to much. I would rather have it break clean and replace it, than rip a big section of plane away.

I don't think altering the control surfaces would be a good idea for a second plane. More for an advance flyer.

I noticed in another post, TWOSTIK has a Four* 40 for sale framed up RTC for $75.00 if you are interested. That is about what you would pay for the kit new.

Just my thoughs, check with others first.
Tim