Okay I'm done tweaking.. I just swapped in the castle Short Course 3800 setup including the ESC and while I swapped it made a few holes in the battery tray & esc tray where I could..
New weight w/o wheels & body is 4lbs 15oz
Add in 14 3/4oz for wheels/tires and 7.5oz now for the body..
Total weight on the track w/ 5400mAH lipo's =
6.33lbs Right where I wanted to be. We'll see though how I like the tekin on the mmp vs the castle 3800 on the SCT esc.