Roger my under the floor resevoir is right under the seat on the edge of a fold in the sheet metal floor pan, I cut an access hole and kept the piece I cut to make a hatch. But years after I did this I still have never made the lid. I think eventually I'll make a screw on access hatch, but run a remote tank set up as you mentioned for the reasons, you mentioned, I'll keep the access hole only for any extensive repairs, later on, but I'd much rather not have to cut the rug up, or get brake fluid spilled inside the car once I'm done!