Ok I think I can handle drilling and tapping the holes. My 1st ? is how do I do the slots? or should I measure where the servo will go and drill 1 hole and if I'm a little off I can enlarge it then. 2nd, I'm wondering if I clamp the channels together, flat side to flat side will that give me a mirror image of the rail? in other words the right will make the left and visa versa.