Can't get timing dialed back to tdc

Moving the drive gear accomplishes little to nothing,cuz, you just reclock the point cam, the canister moves to a new location, but way too far.I tried this years ago, to no good success. There just was not enough slots to achieve the goal, on my application.
IMO;you really have to prove the TDC mark first, then lengthen the slots as may be required.