Back together .... Thanks Mark.
Here are a few pics and a explanation. Install the pivot shaft into case first, the spring has a short tail and a long one. Short goes to the rear of the case, long to cover side. Leave the gears on the bench and install the spring and idler arm w/bearing on to shaft. Let it swing up to the top spindled shaft so the spring has little to no tension. Once everything is slid on to the pivot shaft then swing the idler arm down to tension the spring, hold it there and install the gears and chain. Having an extra hand helps with this part. Oh and remember to back the bolt out that sets preload on the chain, makes it easier to install the gears and chain.