You don't need BMS although George is great. Find a section of road that you can do a manual shift third gear pull from 2K on. Set up your JB4 for logging, map 1, 2, or 3. If it's your first tuning attempt, start with 1 or 2. Start the log and roll on the throttle fully but don't hit the kickdown switch. Hold it flat out, shift into 4th, then stop the log and dodge the po-po. Create a datazap.me account. Log into the account and upload the log. How you get the log off depends on the platform. I have BT and a Samsung phone so I use My Files and email. Set your datazap account to public. Post the link here and ask for help.