You will always have trouble trying to make 90 degree corners, especially inside corners. Everybody has trouble with those type of corners. Round off the ends of the gas pedal slot and you will have a much easier time. OR, you could cut the binding of the four corners on 45 degree angles. Your binding would be in four pieces, and have a seam in all four corners.
It is much easier to sew windlace with a large welt foot than with a zipper foot, (3/4" welt foot for 1/2" sponge rod, 5/8" welt foot for 3/8" sponge rod) but you have to invest about $35 apiece on the welt feet.
Any kind of a welt foot or presser foot will work to sew in the ditch. The thicker the carpet, the harder it is to sew.
No one lives forever, the trick is creating something that will.
Last edited by DanTwoLakes; 01-02-2012 at 10:31 PM.