Those mufflers may be a good solution. I'll look into it. After so much building over the winter, I think I'm going to enjoy this bird a little before I make any changes.
With regard to the finish, it is actually modeled after the Norwegian Special Forces aircraft used from 1967-2001! The plane later got around some and unfortunately met it's demise not far from where I live here in Georgia, US. I found that out after I was well into the project. Good thing I am not superstitious.
http://www.719skvadron.no/dhc6/dhc6-news.htm
If you're thinking about going with 4 stroke glow, I'd seriously look at the OS FS56 or better yet, the YS FZ70-S. Both have a smaller footprint than the Saitos and deliver more power. The YS has a crazy amount of HP. I went with the Saitos because I already had one of the required two and did not want to incur the added cost.
Keith