I think the handle that you grab to adjust/slide back and forth is particular to the right and left side. That is, the handle for the drivers side for L/H drive cars is on the left side of the seat. Handle of the drivers side of R/H drive cars is on the right side of the seat. Or perhaps I have that exactly backwards....
Nevertheless, you are right, Roger, I can make it work using the same runners from two drivers sides...I just wanted to have the handles on "opposite" sides.
Most importantly, I don't have an extra old driver seat from any old sprite at my disposal. Hence the outreach /ubbthreads/images/graemlins/smile.gif