I have a copy of the 10.2 specs but not the 10.1E. Rather not spend $35 for a copy of the 10.1E spec, so I thought I'd ask here. What's the difference between the two? Can the 10.2 be easily upgraded to 10.1E? I run mostly at an IHRA track. Can I go quicker there than 7.49 with a 10.2 chassis? This will help me in looking for a car, though I am thinking more and more of having one built.