That's almost definitly not feasible. The face can be done since its basically one geometry and all that's happening is the right side vertices are being replaced with left side vertices. Fot a left arm to right arm transfer that would be almost impossible since both are seperate geometry parts. If you want to reflect an MT for say the left forearm so it mirrors the MT already in the left forearm then that can be done. MTs are very vertex order, numebr and position sensitive. The left arm just amy not have the same # of vertices the right one has or the left may have its vertices recorded in a different order so an right arm MT would move the wrong vertices or the actual postions of each vertex in the left arm maybe reflectivily different so when the MT is applied it may create unwanted results (dimples instead of buldges). Hope that helps. Keep them ideas coming though and thanks for participating.