Here is my personal version of the "GRR the Ripper" push block.
Actually, more than a push block for the table saw, it is a manual wood feeder, it does not push but grips the wood and take it through the blade, both cut and cut-off pieces.
I have written a detailed article to explain the way I build them and provided a plan and a demonstration video.
I copy here some extracts, but I let you read the full article.
La Belle Note - Manual feeder blocks for table saw
See in particular how I did the T nut slots that go at the front and back edges of the top plates :
Have fun, and keep safe with power tools !