if your content with the 3 then your good to go but, I'd suggest having something with a dull/smooth surface thats not going to be as strong as your robo.
--------------------
-If you're not willing to change, you're not willing to improve.
-Life is like a coin, you can spend it any way you want, but you can only spend it once.
-90 percent of the game is half mental
-Yogi Berra