Craig,
Sounds like you had a great first day! If your already running in the 59s on your first day in a kart and no experience at IMI, you are doing really well.
As far as your muscles go, Mike is right, your just holding on too tight. I had the same experience when I started. Your body will get used to it, and you will certainly start to relax the more you’re in the kart.
My foot has rubbed against the throttle cable in the past, and it can screw with your approach or exit from a turn, but I must have figured out how to adjust my foot because it hasn’t happened in some time.
I don’t lean into turns. Not sure what others do.
Glad to hear you put in some good laps. I look forward to seeing you at the track, when I’m back on my feet. Let me know if you have any questions or need any help.
Good to hear about your day. I was curious how it went.
Tony
send me your address so I can send you the torsion bar and Mychron manual.