Welp... Carbon Steel Alloy is WAY harder than I anticipated...
I ended up grinding down the tip of the broken tap. Then using the hardest punch I had... I pounded it back out the way it went in.
This created four slots in the hole... but it will still hold the bolts for the clamping pressure I'm looking at.
Here are some updated pictures from tonight...
The top and middle acrylic plates are almost done... I have 10 of the jets flared and installed. Here are the three plates.
another view...
Lastly a basic test fit... some of my jet to hole alignment is off a bit. (Don't worry about that hole breaking through... I'm gonna glue an acrylic tube there so it won't be open.
Hope to have the rest of the jets cut to length and the block polished and put together tomorrow.