I have one of these; it makes slices of the same thickness:
http://www.amazon.com/Original-Fiddle-Bow-Knife-Right-handed/dp/B000J3L3EA
-JT
Hey, I have one of those in the boxes in the basement too! And one that was adjustable as well.
I can’t wait to get the remodeling done and get to unpack my stuff! I don’t care about the clothes, toiletries, etc - but I miss all my cooking STUFF!