Anyone using a wilwood manual master cylinder

I have a customer and we've been trying to get his willwood stuff working for some time now. We've got the front brakes working fine but have had a nightmare with the back brakes. Also the angle the booster puts that master cylinder at is a nightmare as well it's almost a 45° angle. And those little Allen bolts to take the cover off every single time what a pain in the butt... we're actually ditching all that for a factory setup that's much more user friendly....