http://www.rccarshop.co.uk/index.php...anufacturer=25
I've never been a fan of the 1251 saw it strip in the original SV without servo saver. I used on in my 511 without a problem, but was protected via a servo saver.
2WD I've generally gone for 1258/1257 or Orion VDS1009. With Sanwa servos now better priced Iwon't by buying a Savox when the time comes.
My 1258 in my 4WD is 3 years old.
Sorry if it's not the info you wanted.