I really like having that extra power. The guys at my club field said that I was nuts putting in an OS .61fx in my H9 PTS. Well I'm flying circles around their PTS's now. I was looking at the Saito 100 because in the RC mags, they always use the 100 on their 60's. I think for the extra $60 it would be worth while getting the 125. I will need to re inforce the FW for sure then. So the G26 will fit in H9 Hellcat? Do you have any pictures of the install? If the G26 fits nice, I rather go with it. From your pictures, I can't tell which one is the 120 or the 125.