Rob, about that chainring: If you have the crank arm at 9 o'clock the Biopace logo should be a bit after 12 o'clock but not quite at 1 o'clock, right on the top, in your cranks. In other words, the larger oval diameter of a biopace ring should be aligned with the crank arm, like this:



You can use the notches on the inside of the rings as a guide for alignment