I have the 110 lumen led version of the E1B I believe. I know it isn't the 80 lumen model. I saw an older thread where Tana was offering some aftermarket head upgrades. Just brought this baby out of retirement and looking to "modernize' it a bit. Any replacement heads or original head mod recommendations for EDC? I have a Z68 tail coming for it. Would this work with any configuration to use rechargeable 123s? Thanks for all the help in advance for this semi noob!