Falcon

I have never formally learned to use a Makiwara but a mentor who recently passed was talking about teaching me but never got the chance. He talked about it creating good form and technique. Not hitting it as hard as possible. I need to build one, I saw designs with 4x4 posts but before I decide I want to see if anyone who trains properly with a Makiwara can help with a proper design and recommend techniques to get started in its use properly.

Thank you