RE: stearing?
you can get 8mm bearings i think it is and replace the plastic bushings in your steering bells and your throatle bells. which will lessen the drag. therefore make steering easier and more robust. a GOOD servo will help ALOT too. i use a JRZ9000T @115.00. but a 50.00 hitec hg645m will work well.. personally i like overkill on my steering..
Timmahh