Thanks for all the info, I didn't buy any extra spacers but I generally don't use my 18350s unless my 18650s are low/charging. Though I do check both their voltage before popping them in to make sure they won't reverse charge one another. Its always best to have a spare charger in case but come Tuesday (the Mail willing) my TR001 will be going on my miscellaneous vape box with my cartos, carto tanks and the other memorabilia. The more I vape the more use I get out of multimeters its quite nice lol.
