Chain Pen Switch Fail

After playing around with lifting the pen to activate the unit, I realised that it made the whole experience of using the unit, very clunky. The user would have to try to turn the dials while having both hands full - one with the pen (to keep the unit on) & one with the notebook.

In summary, I think I'll just stick with the pen simply hanging & a toggle switch to turn off & on the unit.