hobby lobby and micheal's both carry clay guns. They are clay extruders intended for use the polymer clay. They work really well with fondant and gumpaste.
Wilton makes a lettering kit too. I have several of the press kits, but not the lettering one. It's called Make-Any-Message Lettering kit. Here's a link. I've seen it at Michael's and Hobby Lobby....
My DH is diabetic. Anytime I make a recipe for him, I use 1/4 of the sugar called for in the recipe and about the other 3/4 of the sugar I replace with Splenda. But I agree with JoAnnB, and IMHO, Splenda actually tastes sweeter to me...
I use this enhanced cake recipe from CC. I don't do much fondant either... HTHhttp://www.cakecentral.com/cake_recipe-1953-Super-Enhanced-Cake-Formula.html
I don't think I'd go with ganache personally if you don't want it too sweet. If they like peanut butter, I've used the following recipe as a filling with cream cheese icing. It was too much for me as a frosting...but just right as a...
"Simple mistake" just doesn't fly with me. Removing a watermark is time consuming and intentional. I don't feel sorry for anyone losing business if they behave badly. I'm part of the "mob" that says you can use my pictures if you...