Long story short, I changed my stock seats to Corbeau RRS with Corbeau sliders and Planted brackets. I love them, they sit much lower and the quality on them is great!

HOWEVER, the seats sit paralell to the floor with no sloping back like the MINI seats do when lowered as far as possible. While the planted brackets / sliders let the Corbeau seat's butt area to sit as far back as the stock mini seats can due to the lack of slope it feels like there has been 2-3 inches of legroom cut in an already tight situation for someone that is 6'5.

The back of the Corbeau seat is not as deep as the OEM MINI seats, so I still have 2-3 inches I can slide them back before contacting the rear seat (which was the limiting factor on the factory seats) HOWEVER my sliders do not slide back any more to accommodate for this. Does anyone have suggestions? I can not drill holes in the planted brackets further due to lack of metal on them, so I'm thinking my best option is maybe a different brand of slider?