Thanks guys for your advice, I used to have a Super Sportster 40 back in the 80's and I did like that plane a lot, I'll guess the 4 Star also flies the same way. I let Jimmy decide want plane he like's the best.
Now the question may sounds silly but Jimmy discuss that a trimmer engine like his 25cc has more torque or hp than say any 25cc engine design specially for RC, Is he right??

Best Regards

Daniel