Nice smooth, flowing lines..!
I've never heard a 4C glow engine run like that..!
Looks like APC was right on top of the situation.
How many planes and engines did it take to get through the season...?
What are those tail feathers made out of...?

For a 160 mph 1/2A to be feasible I think the piped Profi control line speed engine is the ticket.
I just looked this one up [to copy the photo] and the poor orphaned engine just sat there with no bids at $300
Steve Wilk of Eliminator Props specializes in C/L Speed props and is a great guy to work with..with what seems like an infinite selection of "possible" props for many applications.