depending on the nitro % you're running, you add shims accordingly....higher nitro % generally add shim...and lower % minus shim...too many shims is not good....(from my understanding)...
when you say hotter, how hot does it get?...normally, when you lean it, it shd run hotter....and it's normal...
if you don't have a temp gun, just use a spit test...spit a tear of saliva on your finger, dab it onto the lowest portion of your cooling head (where it joins the crank case)....if the...
you should be alright with that temperature you're getting....
once you start driving it abit more, the temp is going to rise up more....keep it below 260-270F....
And yes, always to keep it BDC after running....longer life for your engine...
i love to hear the father and son stories like this one....i hope when my 6weeks old get to a good age, i can spend those time with him (with the RCs) as well...
good job!...
your diffs will be good on the 30K diff oil....
As for grease..you can use automobile grease....for me, i just use Eureka grease or Tamiya grease on the ring gear and pinion...