OK. After trying out the 20kg ones I sent those back and picked up the Hexfly versions of the DS3255 servos that are pretty popular. I bought a 2 pack for about $37 shipped one day from Amazon. I know you can get them a lot cheaper but since I had my truck all torn apart I just decided to get the ones from Amazon. As I guessed from my other thread the 25kg ones seem to be slightly shorter than the 20kg's. But even so I had to use the plastic spacers to get the servo to mount tight. But now that its installed all I have to say is WOW. They are fast and powerful. Didnt expect that much of a difference. Anyway now to install the extra one into my Typhon 6s. Pics added.