Value study of a goose foutain

I have been doing some value studies recently. Here's one a "goose fountain" (not working at the moment). I dedicated a sketchbook for these value studies: Beta Sketchbook from Stillman & Birn. I use heavy body acrylic by Golden. I use carbon black, titanium white and 7 neutral grays (N2 - N8) in between. So no mixing, just dip the brush and apply. Sounds simple, right?... I spent about 2 hours on this one. :-)

Hopefully, I'll get better/faster at seeing value patterns and better plan my paintings. I'll try to stick to value studies for a little longer...

Value study of  a goose fountain (not working) :-)

Here's the real thing I tried to paint.

Part of my setup at the end of my session.