Trying to make 100% rye

[Ringo]

I am trying to make %100 rye. This is my first all grain attempt, and I am looking for comments and tutoring. Here is my recipe for a 10 gallon batch:

1. Heat 10 gallons water to 125 F.
2. Mix in 14 lbs. cracked unmalted rye. Rest at 120F for 30 mins.
3. Add 2 lb. cracked malted rye and 2t amylase powder. Raised temp to 150F.
4. Rest at 150F for about 45 mins.
5. Raise temp to 190F.
6. Rest for about 3 hrs. Temp is now back to 150F.
7. At 150F, add 2 lbs cracked rye malt and 3t amylase powder. Still not passing iodine test. Insulated overnight.
8. 8 hrs later- temp still at 150F. Iodine test passed.
9. SG is only 1.040, or 5% potential alcohol.

Question #1 - What do you think of my recipe and yield? Seems low to me.
Thanks all!