I've all but given up on my tank mods too- the MAP just doesn't do it for me- no matter what I do, it seems to give me burnt taste... and if you bang it the wrong way, it leaks.....
I occasionally use the vapemate in the car (when i remember), but around the house, it's more trouble than it's worth....
I've been collecting data for a while- looks like over time, the 18650's seem to be running longer- I'm also rotating through 6 18650's (my 18490's are also collecting dust) ...I'm wondering if resting the batterys after you charge has something to do with it- , or if maybe switching over to the Pila charger may have done something, or just breaking them in for a few months did the trick. Are you seeing similar results?... I'm now getting 5-6 ml running HV attys between 5 and 5.5V (usually 8.5Watts)