I have the express 3 which I'm guessing is not the J1 as I was led to believe, rooted through the method found here in the j3 forum. tried flashing twrp for the j1, having seen the 2 referred to together. now I get the "could not do normal boot. invalid KERNEL LENGTH." flashed through odin the ENG-BOOT used to root as well the stock firmware to no avail. any help to be had a great thanks to you.