Oh, I love flapper waves. I've been meaning for ages to buy the pins so I can do that hairstyle. But I can understand how that one piece will drive you bonkers. The hair around my face a tendency to go east west if I don't put extra product so I know all about pinning things into place. Have you tried finger curling or I think it's called skipcurling that one piece? I've never been able to do the technique myself (my hair prefers scrunching) but some make it looks ridiculously easy. I think waterlily716 had a video on it about styling side bangs.
3A - C, HP, ME, HD. (Coarse, High Porosity, Medium Elasticity, High Density.)

CG since Nov. 2012

Poos: SM Moisture Retention + Yucca Baobab, TJ's Tea Tree Tingle
Condish: TJ 'sTea Tree Tingle*, SM Moisture Retention* + Curl & Shine + Yucca Baobab, Yes to Blueberries
Stylers: KCKT*, SM Curl Enhancing Smoothie* + Curl & Style Milk*, KCCC*, FSG*, CJ Pattern Pusha, Curl Keeper
Sealers: Jojoba* or Grapeseed* oil

* = HG