Xperia Z3 bootloop after TWRP

Xperia Z3 D6633 I followed the very many tutorials (pick any on google) saying to flash (in fastboot) the file bootZ3monxtest01.img fastboot flash boot bootZ3monxtest01.img Now I have a bootloop around the sony logo. No system, only recovery (TWRP) available I can also reflash the whole system through Sony's Flashtool, but it kills the point, as a custom working recovery is required for later rooting Obs. 1: Needless to say that the "usual" is to flash recovery onto recovery partition. I tried that. Nothing happened Obs. 2: KingRoot rooting method worked, but I fail miserably to replace it by SuperSU Obs. 3: It's my third attempt :(