Cummins ISB ECFG files — 4 versions for ISB 5.9 / 6.7, E2M legacy tuning definitions

Every Cummins ISB ECFG we hold: 4 software versions from 3958838 to Isbp700 on E2M legacy — ISB 5.9 / 6.7, Automotive on-highway. Each version has its own page with the full header (module, build ID, interface level, boot loader range, parameter count).