i am aware of all those things hell i pretty much go by this
http://fc3spro.com/TECH/DRIFT/dori.html. which i believe you wrote a little bit ago.
as you stated "Also, wider rear tires usually makes it more tricky to throttle control due to more rubber." now since im using a 4port engine (t2 deturboed) for extra reliability, my power is waay down and not to mention torque. also as i have stated previously i have to have stretched tires to spin the 17x10 w/ federal 595 225 series tires at the rear. i should be using a smaller diameter wheel but it just looks funky
now til i blow up this engine then go v8 then ill choose to run non stretched tires but til then ill work with what i have.