This is the commercial hatch dog that I bought.
This is where I started. I'm trying to figure out what angle would work best for the hatch and feel comfortable to me.
This is my first iteration of the hatch dog. I used plastic parts that I purchased from Bomar hatch company.
With very little pressure I was able to compress the gasket to seal the hatch. The angle of the hatch dog was comfortable and I could easily torque it to the tension I needed to seal to hatch.
The creator of this guide has not included tools