How many questions will I be allowed to ask?

The purpose of blending airfoils is to get a wing with the characteristics that you want. Right? Soooo... What would blending a Clark YH to a blunt symmetrical airfoil do for things like stall. What other things should I be looking for? (root clark yh to tip symmetrical)

I have recently done this on a delta and ended up with a perfect airplane. It had no bad characteristics at all. Is that rare or is it difficult to make a bad flying model airplane?
Any examples of commercial models with blended airfoil?