My 2012 P85 with 117k miles showed BMS_u029 error message. Tesla service diagnosed "short to HV battery which limits max SOC to 50%". Remanufactured 85 kWh battery quoted at $15k ($13.9k battery, $390 labor, $1115 taxes). New 85 kWh $20k. Both come with 4 year warranty. Pro/cons reman vs. new? Any other thoughts? Thx.