My shop neighbor Arnie is a talented welder and he got his hands on a MIG welder today.
Arnie, welder extraordinaire
He offered to help us weld up the sled. Sweet. Some pics of the welding:
The finished sled:
My first weld:
It was hard to see the line I was welding.
Prometheus Fusion Perfection 
[…] and are pneumatically actuated (not so great). Adding a gate valve will require us to redesign the welded sled; and I bet it won’t be the last design change. To keep it flexible I’m going to take […]