CakemanOH: With the 6x powdered sugar, do you have to sift it more than once? Also, do you use 6x powdered sugar for all of your baking, including cookie or candy recipes? This is a little off topic, but in your BC recipe, you use white icing base. Where do you get it from and does it go by a specific brand name? I've tried looking online for it and the only place I can find it is a Sugarcraft and after all the negative things I heard about them, I don't think I would want to risk ordering from them.
tmriga: As far as I know, you can use hi-ratio shortening for all of your baking (cakes, icing, cookies, etc). Besides buttercream, the only thing else I've tried it with is in my chocolate chip cookies and they tasted pretty good.