I think I have finally figured out the porosity issues

I think I have finally figured out the porosity issues I am having with my @hobartwelders 175 MIG welder when using ER70S-6 solid wire and C25 gas. That aluminum block in the second photo is the gun connector. It and the brass fitting on the gun, third and forth, had corroded so badly that I am sure there is an air leak. Trouble is, that part is no longer available. So until the Bridgeport is up and running so I can make a new one, going to have to resort to E71T-11 flux core. It welds nice, but the smoke and fumes is a pain when welding indoors.
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I recently bought a Bridgeport vertical mill that is in need of some work.

I recently bought a Bridgeport vertical mill that is in need of some work and repairs. The milling head was not attached to the base. I wanted to get it put back on, but it weighs over 100 pounds (without the motor) and the bolts are tricky to line up. I have seen other videos from Mr. Pete and H&W Machine where they used a special tool to make removing and installing the head much easier. I decided to make my own version of the tool.
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Welding squares

Inspired by a product I have seen online and used in other YouTube videos, I set out to make my own welding square. I learned a little Fusion 360 and designed this small 8″ welding square. I was fortunate enough to have this cut out on a water jet at a local maker space. Used the Primeweld TIG 225x to weld it up.

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