I had a Glass by Price P38 with OS 61's inverted...took forever to get them to run inverted even with onboard glow. When we finally got them synced and running they ran great.
My friend did the maiden for me and very glad he did I was totally nervous.....
Here is the link to the maiden, and even though it tipped stalled on landing the 61's pulled it through the sky with no problems, unfortunately lost it in the Great South Bay off Long Island, not sure if it was an engine problem or an aileron servo gave way.
Now working? on a T28 Trojan and trying to decide if I want to try another P38.... I saved the engines after the water crash so.....
https://www.youtube.com/watch?v=g3AP...are_video_user
Larry