Do yourself a favor and get a trim iron, if you haven't already. Use the flat tip, set it on high for Monokote, and use it for those rounded areas (like the rudder bottom). It's slower than blasting with a heat gun because you have to work a little at a time, but much easier to control and will get out those nagging little wrinkles that the big iron won't. I rarely use a heat gun on a model this size, just the two irons.