ALSO: USE REGULAR WOOD WITH THE KIT. So that you can ENHANCE it after creation. 
Ok, I'm going to question this thinking now.
If I'm making regular bows I have 100% chance of making exceptional items. Lets say I'm using a Heartwood kit, so intensities can be 100%.
Now I make this AWESOME bow with 50% Lightning, 50% Velocity, 50% Lower Defense, Balanced and 30% Swing Speed.
If I made it with ash wood, it would be at 40% SSI.
If I made it with regular wood and enhanced it, one of two outcomes.
1 - It has 40% SSI, just like if I had made it originally out of Ash.
2 - It's destroyed.
So what did making it out of regular wood accomplish for me? The way I see it, only a chance to destroy the bow.
I'd like to know the reasoning behind making a bow out of regular wood, then chancing loosing it while enhancing....