Just wanted to post a quick update about my batch.
I did the second of 5 planned stages of dryhopping yesterday. Added 0.9oz each Simcoe and Amarillo and 1.3 oz Citra. All my hops have been whole leaf, which has made dealing with this beer a bit of a pain. My brewing kettle got clogged so badly I had to scoop the wort out with a mug! Anyways, I've run out of hop bags to put my dry hops into, so I may end the dry hopping with 3 additions instead of 5. This will allow me to use the extra hops in a new brew this coming weekend.
Also, I noticed scottland said the reason he modified his recipe was to make a hoppier version of the 120. I think my goal is to come out somewhere close to the taste of 120, but just cutting down the sweetness somewhat. Therefore, I don't think the planned full amount of 1lb dry hops is really necessary. One more dry hop next week and I'll report on the taste test.