Pedro,

The tendency to snap is not as bad when you keep the weight under control and use exponential rates on the elevator. I started with a TT 90 four stroke. The power was good, but it weighed too much. Since I changed to a TH .75 2 stroke (a weight difference of about 7 oz) the plane handles very well and smooth wheel or 3-point landings are easy to do. Landing under a little power when the air is turbulent also helps to reduce the danger of a stall. It has unlimited vertical with the TH .75. I use 50 % exponential (Futaba 9C radio) on the elevator and 30 % on the ailerons and rudder. I always fly on high rates. It can still snap-roll violently, but only does so on command.

Since I fly from rough grass I did not install the wheelpants and I use 3" light weight wheels. I built my Giles strictly according to the plans, apart from shimming the landing gear forward to prevent nose-overs while taxiing. The fuselage has not failed at the thin area behind the wing as some people have suggested could be a problem. I did not keep a record, but I must have flown the Giles hundreds of times by now (including a few hard landings that bent the landing gear) without any structural failures.

You may find that using a lower pitch prop (try 6 instead of 8) will improve your Giles' vertical performance and increase control on landing approach. You don't need high speed on the Giles, rather trade speed for higher torque.

I think it is an excellent design. Just take care to build it light and straight.