This is good for the home hobbyist. If you experience good success and want to try more, I would invest in a professional soil block maker that can do multiples at a time.
See this site for some great advise and ideas on the soil block method. I am not affiliated with it. http://www.pottingblocks.com/ The gentleman who runs the site is very knowledgeable and helpful in returning emails. He also has supplies and square soil block makers at reasonable prices. I learned a lot from all of the content he shares.
Step 1: Parts and tools
2" inside diameter PVC pipe
3/4" wood dowel
circle cutter for use in drill press only
3/4" forstner drill bit
hand saw - not shown
Polyurethane - water based or similar to seal
3/4" wood screws
3/4" thick wood scrap (I used Pine)
The drawing shows the idea of the soil blocker. You can start off a seedling in a 3/4" block then transplant to the the 2" block, then a larger block or pot. No shock to roots.