Posting this because you can’t have too many tips for this frustrating job. Tried various ways for the install. Best tip was to remove idler (top) pulley. Good time to replace if it’s questionable. When routed, rotating tensioner enables you to position the belt below the lip where the idler bolt will go. Install idler pulley 1/2 to 3/4 of the way and with tensioner engaged, belt will slip under pulley with a little force. Tighten. While this is not rocket science for the real mechanics here, I had to search for a while before I found this tip so figured I’d post aanother thread to find. Don’t know how non-mechanically inclined people fixed anything before YouTube and the internet.

Moved to C5 Tech.