Yes but since you are 3B and you want 3A, it's the same system. (At least that's what I meant. I only mentioned my waves by way of illustration.) You could revert to looser curls just like I can revert to waves. If you're a 3B styled then you might be 3A less styled, you know what I mean? But yes, my hair is a little longer. And weather does play a role in making your hair curlier.

I'm not sure about the low poos and conditioners, but I haven't noticed any of the conditioners I've used have made my hair more curly or less curly. Really the curl comes with styling. At least for me.
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