I used the clutch alignment tool but I'm having trouble pulling the gearbox far enough forward to slip the bell housing over the flywheel. I have tried various angles for hours and hours over the past week but I just can't seem to find the clearance. Because I've spent so many hours on this I have all the surfaces mapped out pretty well in my head and I can feel which part is getting in the way at any angle. I can also see all the scratches building up every time I drop the transmission to confirm my thoughts. Has anybody done this before or has some general advice? This is my first attempt at clutch repairs.