Hi wonderful community! I am looking to embark on a coffee table project (this is just for myself) and would love to make ceramic legs with a glass top (this is where the weight issue could be). What are your suggestions? Should they be hollow so a metal rod can be inserted (after firing) for strength, or would solid be better?  They need to be approximately 14" in height and I'm guessing 3-6" in dimeter. Thank you!