Nice looking little plane Mike is showing. You can also look at the House of Balsa web site at some of there smaller planes. I only use the LA .40 in the smaller trainers but have used the LA .46 in a number of 40 size fun fly planes like the Up-Roar and Dazzler. For some reason there is a huge difference between the power of the .40 and .46 in the LA series. The LA .40 may fly the GP Up-Roar ARF??