I have a arrma infraction locked center diff and front diff. Rear diff is is 500,000 I did 7000 weight in the shocks like you said and got rid of the silicone tubing and used the droop screws. I have a Cordova 2000 kv on the way and it will be here in 2 days also running a hobbywing max 4 . Currently using the max4 with a Cordova 2300kv and can't break past that 2.1 et.... After finding your channel and watching your videos I was just amazed And figured you're the guy I needed to ask for help to break into the 1.99 range any gearing suggestions please!!!