Just a followup for the non technical folks watching. I installed the new contacts last night, and like many others, had to go with a higher ohm coil. Bottom line for me (not a sub-ohmer) is I'm getting as good or better vapor/flavor, but measurably less drain on the battery.
Since I change out the batteries on a schedule, rather than by performance dropoff, I expect this means I will be swapping out the batteries at a higher voltage, which in theory means their useable life (number of cycles before retirement) should be extended. That, and hopefully even less maintenance than the practically none I was doing before. These improved contacts are a win for me, even though I'm not a "lung burner". Thanks, Robert, you've made a great product even more stellar
ETA: I've noticed some mention of sparking when firing. With my now 1.83 ohm coil, I'm seeing none at all, either before or after installing the new contacts.