+1 on just doing it.
I was surprised how quickly it came together. I still haven't quite mastered the elegant stop and dismount move but that will come.
Re Charge Plug - had one for a few months but sold it on - it is solid (quite heavy compared to a 531 road bike conversion) and simple (reliable). The geometry gives quite a shirt top tube so you sit quite upright which is good in traffic. I preferred the feel of the lighter bike and felt I got more power from the more forward position, so I kept that one.
I just put the new flip flop wheelset on today. One lap of the block shouldn't give me a grin like this at my age, ah well.