I experimented today with a kicked 18650 in the TS and found that the battery spring and the switch are the weak links in getting the Kick to work properly.
I vaped with no misfires for about 2 hrs, then I had to start fiddling/resetting the connections. I reversed the spring and got about another hr without misfires. Once I started getting misfires again, I started pressing my switch with a side pressure and all was well for a couple more hrs. When misfires came up again, I removed the battery spring altogether and now I'm back to all good again.
The springs don't appear to be able to provide the necessary connection. This is the first time that I've been able to use all of my battery before the Kick stops working.
Time to figure out some good mods for this issue