Any way to lower the seats
 

I am not particularly tall at about 5'11. I am mostly torso with barney rubble legs. I have 3 problems.

1. the seat in its lowest position has my head near the headliner in the lowest position. Is there any way to make it lower? Has anyone done it themselves?

2. In the lowest position, the mirror is in my main field of vision. When I pull up to an intersection, a car approaching from the right can be completely blocked by the blind spot this creates. Any fix for this? I was thinking about taking the mirror off of the glass and raising it up about 4 inches. Any problems with this plan?

3. The sun visors do not hold in place. They sag into and completely block my view if I push them forward towards the window. Is this a known issue and is there a known fix?

I don't think problems 2 and 3 would be that bad if I was not sitting so high. I would like to lower the seat 3-4 inches.