By using symetric fixation for right and left alloy parts on the rear pod. We are doing the same on our prototype...
About saving weight, in 1/12th scale much more than on other classes : 1 gr is 1 gr...
--> So less material to fix the motor is ... less gramms.
A good friend told me in th past : in 1/12th scale, Devil is in details. He's right...