Hitting platform for my daughter who coaches volley ball. She needed something she could carry in the back of her Tahoe and could easily put together without a lot of work. I decided to use some 3/4" plywood for the sub base and the platform. I wrapped the platform with some soft white pine 1 x 4 and eased the edges with a 1/4" round over bit. Covered it with a rubber mat that I glued to the top and took pieces of the rubber mat to apply to the bottom of the feet of the platform sub base.
The two pieces of the sub base slide together to form an X that the platform 1 x 4 sides engulf and gives the whole platform excellent stability. Put together it is approximately 18" to top.
Cut hand holds and eased the holes with round over bit in router. The pieces have the hand holds located so as to be able to carry both with one hand.