Ciao Planko!
As you say .. Sikorsky got there in the end (engine wise). Not that they 'perfected' it however for even the C++ has been accused of being short on power in certain scenarios.
Made slowing down quite fun ..
Noses High
A trait shared with the 139 ..
Note the 139's main gear hasn't even left the ground .. while it's nosewheel is 2-3ft in the air!