OK I now have the e-tracts installed but I kept the servo mount to the front LG and then bonded the front steering so only the servo moves the LD..
and the sound these things make is wonderful
http://youtu.be/xgkPpxkJRVE
testing is next and then the sky!
All servos that were related to the old way are now gone...the XB-70 is now lighter than before...