Which MillMax socket are you using?
Now you ask a hard question. I went to look over the bench where I have been assembling modules for my Eurorack modular off and on for several months. I have found two open packages of 16 pin sockets, both with sockets missing. I'm not really sure which one was used in that picture.
One package is Mill-Max 210 47-316-41-00100 Digikey ED11148-ND They are about 85 cents each in qty 10 at Digikey or Mouser.
The other package is Omron XR2A-1611-N They are about $2 each today, and I wouldn't pay that much, so I looked up the order number. I bought them in April 2015 when they were $1.10 each.
Back in the mid 70's myself and several friends were building clones of the SWTPC (Tiger amps) 6800 computer system. We lived in hot and humid south Florida and we had trouble with the cheap tin plated IC sockets of the day. What we thought was bad memory chips turned out to be intermittent sockets. This taught us to not use sockets for cheap chips, and to use decent sockets for the expensive chips. I still stick to this process.
Looking at the board I just built, there are no sockets on the opamps. The only reason for changing them would be if I blew one. I would just cut the old one out, remove each pin from the board, clean the holes, and put in a new one.
"flash" is good enough unless you need to swap out the IC dozens of times or more. What do you think?
Here the quad VCA chip is socketed because an adaptor must be used, and I have two different brands of SOIC chips to try. I don't think I will be swapping chips often either, so I spent about $0.85 each for a dozen decent Mill-Max machined pin sockets from Digikey two weeks ago. I have never had one of them go bad, unless I did something stupid to it. Looking at the board, the other completed boards, and the sockets remaining in the packages, I'm 90% sure the new Mill-Max socket is in the board in the photo.