2nd row seat for a panel.

[robb67]

Hey all,
Has anyone on here installed a second row bench seat in their panel? I'm looking for tips and pics.
The previous owner of my panel (my friend) once screwed in some lawn chairs for the second row but I was thinking of something more permanent and safe. I also figured I'd get more family trips in the panel with a couple more seats. It'd be great if they were easily removed like modern van seats but I'm looking at a blazer bench seat on the parts board.
Thanks.
Rob