Help please - success unpacking system.img, no mods done as testing, success repacking the system.img and shows exact 100% byte for byte comparison with the original system.img, this shows the empty space has been added to the image and is exact and perfect for the system partition. Flashable zipped then flashed and hangs on the bootscreen. This is the problem I can see - When compressed to zip, around 100mb are lost, i.e reduced zip size, when compared to the zipped original. Could anyone please tell me what's going on here, thanks, help is greatly appreciated.
Edit: Boots up fine now & working perfectly, problem was a system app causing the hang, nothing to do with the free-space in the system.img which incidentally turned out to be 359mb. Removed 5 system & preload apps on second test, zipped & flashed, all working perfectly, very impressed with your great tool, thankyou so much.