It's also interesting that the TOWER ad says that they're selling the engine with two adapters. I can't remember ever opening up an OS box and finding even one adapter with the engine. It's such a leap that OS would suddenly decide to include TWO adapters, that you'd think there had to have been something special negotiated somewhere.

Why would the ad writers have plugged such an unprecedented enticement into the ad if there hadn't been some kind of reason?

BTW, the engine manual does list all the parts with parts numbers. And nowhere is any adapter or extension shown.