TS claimed that he normally uses just half a second. To achieve this it is of course essential to have the equipment close to the cryo stream. Most people flash freeze their crystals that is they just put the crystal in the cold gaseous nitrogen stream. But some put the crystal in liquid nitrogen or propane. The latter has the disadvantage of being bad behaving but at least AY claimed it to be necessary for the ribosome crystals.
Some people use ethylene or freon instead of propane.
Attachment of the pin with crystal to the goniometer head and storing crystal after characterization. TS had the simplest way to solve this he just used a nickel coated brass pin and stuck it right into the hole of the goniometer. This works fine if you don't need to store the crystals afterwards. EG and EM both use magnets, but their setup differs a bit. EM fixes the pin by putting the copper pin into a special device.