This is proof that Cox engines can do stunts (including inverted flying).
I flew Iyer's Combat model with Cox Black Widow and kite thread lines.
I never used Dacron thread, 7-strand wire, and spider/spectra lines for flying 1/2A models.
https://www.youtube.com/watch?v=QG_Xpchsd38
https://www.youtube.com/watch?v=IRlTPpP0htM
A pic of the ComBat...
Wonderful flying. Nice stance and control. Congrats.
I have used a 7-strand control line wire for a flying senior peacemaker with a 25LA, 15LA, 3.2cc Sharma diesel engine engine.
For flying 1/2A models, I never used Dacron thread, 7-strand wire, and spider/spectra lines.
There is a difference.