Took my TRF103LM to track last week and ran with other F103RM, F1 ... etc. I was not able to keep up with my peers when running the Tamiya black can, 4000mah Lipo and Futaba MC230. I changed to VFS1 and used a very agressive profile - can now run with the rest ! Not bad, a pack of 4000mah Lipo can last me at least 20 minutes of run time, I am impressed on the control and consistency.