I like the plate style mount that you've come up with Jason. Good work. Something in the plate style would work great on an E9, but would have to be wider because the distance between the stock seat rails on an E9 are wider than they are on a 2002. I have Scheels mounted in my E9 using Recaro sliders which I had to re-drill to match the Scheel mounting holes. The main problem on the E9 is the height of the seat. If you think that your Scheels sit high in a 2002, its much worse in an E9. That's why using something like the plate would get your seat to mount as low as possible. I'd be interested in the plate-style mount for a 2002 and also one that would fit an E9 if that could be done. I could create a template for the E9.
Also, does your plate-style mount center the seat on the steering wheel instead of having it centered between the two rails? Thanks,
John