1.The best way to cut your body posts?
Dont Cut them, If You cut them then you will have Very limited Shell selection

2.PVC,ABS, Yokomo Drift Rings Tamiya Type D tires which is best or ae they generally the same?
ABS/Black Polypipe Offer best Slip for Grip, If You really want to have Authentic looks and some High Speed fun on a Polished Concrete Floor then go the rift Tyres



3.What type of Spur gear and Pinion should I use with the Tmaiya RS-540 Sport tuned motor in my TT-01?
I Use The Stock 19/61 Ratio in my TT-01 and it handles my 10x2T Motor with Ease and Very little Heat Build up and Is Great for Drifting.


4.Does the wiper,muffler and mirror set from yokomo fit well on a Tamiya TT-01 Body?
Yes. they will fit most Shells

5.are alluminum wheels worth it (besides the look)
I Find Plastic Wheels do the job fine, If You mean Aluminium as in Chrome Plated Rims? then I have discovered that over time the Chrome Chips off leaving an Ugly looking Rim..