Bit of both on my evo ones.

As the mr2 standard rails are single items I welded a bar across each one to keep them at the same level when removing.

Then drilled holes into the rails to bolt to my seats.

There was a few other minor things I did that I can't remember including cutting off the seat rail adjusters and rewelding the adjuster on a a different angle as the new seats fouled the bar.

I also trimmed off any excess metal with my grinder.

I suppose it depends what your seats are like.

I then removed the welded bars as everything was mounted.

Didnt take any pics I'm afraid.
