Remember that heat can sharply reduce setting time, depending on the epoxy type.  It might begin setting up during the pour.  I hate it when I hear myself yelling, "Oh no!". 
You might try a test batch first...
- Mike  KC4TOS

On 3/24/2025 2:16 PM, Jeep Platt wrote:
Ahhh.. that may be the key!  Heat. Will try that. Thanks again to all. 
Jeep K3HVG

From: [email protected] <[email protected]> on behalf of B. Smith via MRCA <[email protected]>
Sent: Monday, March 24, 2025 2:11:46 PM
To: [email protected] <[email protected]>
 
    Use standard epoxy, do not use quick setting.   Use Vaseline and cardboard to keep the epoxy from sticking.
Mix the epoxy and then heat for20-30 seconds and it will pour like water. Use brass tubing or rods from K&S metals for the pins. It is available in metric or US measurements.
Z

On 3/24/2025 8:45 AM, Doran Platt via MRCA wrote:
I have had to make up a few connectors, primarily from open headers, vice from total scratch. I have been using JB Weld with good success.  However, when things are at close quarters, pin wise, the JB does not flow elll (cold flow) into the nooks and crannies.  So, what do you all use?  I visited H.D. and looked for something either JB or Gorilla that might be more fluid.  I bought a clear type but its not clear it will dry properly in a larger volume.  All the 2-part epoxy products are simply non-flowing. All suggestions appreciated.
Jeep K3HVG