Wolf Run Green: My List. Thoughts?

Here is the new list I am looking to put together for the local circuit:

• Main Deck:
• 17 Forest
• 4 Rampant Growth
• 4 Garruk, Primal Hunter
• 4 Primeval Titan
• 4 Birds of Paradise
• 4 Dungrove Elder
• 3 Green Sun's Zenith
• 3 Solemn Simulacrum
• 3 Beast Within
• 2 Inkmoth Nexus
• 2 Llanowar Elves
• 2 Kessig Wolf Run
• 2 Mountain
• 1 Batterskull
• 1 Wurmcoil Engine
• 1 Acidic Slime
• 1 Copperline Gorge
• 1 Rootbound Crag
• 1 Slagstorm
• Sideboard:
• 3 Thrun, the Last Troll
• 2 Sword of Feast and Famine
• 2 Blasphemous Act
• 2 Ancient Grudge
• 1 Tree of Redemption
• 1 Arc Trail
• 1 Viridian Corrupter
• 1 Ghost Quarter
• 1 Gut Shot
• 1 Acidic Slime

I welcome opinions on the numbers, especially the sideboard! I was torn on the Slime, or if i need something like the fourth Beast Within. Also maindeck, I'm torn on Copperline versus Rootbound: at the end, either tutors off a Titan for the red next turn (provided you aren't getting Inkmoth, etc), but still.