Which is the easiest rebuild?

[18MGFog]

I have tried rebuilding CE4, but the rubber bushing is too short, and my coil shorts to ground. Have succeeded in rebuilding Kanger T3, but need to tinker sometimes, and there is less room to work than I would like. Has anyone experminted with several rebuilds, and found one that is Really EASY? Thanks!

[IMEDICx90]

The protank has a fantastic rebuild head. It is small but easy to dismantle rebuild and put back together.