Bru's Imperial Cascadian Dark Ale

This is my imperial version of a cascadian dark ale.
Its turned out really tasty and not too bitter despite the 74 IBU.
This is for a 11 gallon batch at 80% efficiency.
Quantities have been converted from metric so may differ slightly.
Ive kegged the first 5 gallons. The next 5 will be oaked.

Grain bill :
23 lbs. 2 Row Malt
1 lbs. Flaked barley
2 lbs. Crystal 40L
11 oz. Carafa 1
3 oz. Roast Barley
2 lbs. Cane Sugar 10mins

Hops :
2 oz Simcoe [12.10 %] (60 min) Hops 27.6 IBU
3 oz Amarillo Gold [7.50 %] (60 min) Hops 34.3 IBU
1 oz Amarillo Gold [7.50 %] (30 min) Hops 7.5 IBU
1 oz Amarillo Gold [7.50 %] (10 min) Hops 3.5 IBU
1 oz Amarillo Gold [7.50 %] (5 min) Hops 1.9 IBU
1 oz Amarillo Gold [7.50 %] (0 min) (Aroma Hop-Steep) Hops
3 oz Amarillo Gold [7.50 %] (Dry Hop 7 days) Hops

I used the simcoe at 60min but next time its all Amarillo.

Yeast :
2 Pkgs Nottingham (Danstar #-) Yeast-Ale
or US-05
Ive made both and prefer the fruitier US-05

If anyone has any comments or suggestions that may improve the recipe I'd like to hear them.
And BTW - I realise theres no official category called Imperial Cascadian Dark Ale

this may sound dumb, but why call it Cascadian if ur using Amarillo hops instead of Cascade?

Im sure David 42 won't mind me posting his thread here :
https://www.homebrewtalk.com/f14/proposed-style-guidelines-cascadian-dark-ale-161579/

and
https://www.homebrewtalk.com/f14/cascadian-dark-ale-black-ipa-should-new-style-bjcp-161236/

also,

http://***********/stories/beer-sty.../2072-birth-of-a-new-style-cascadian-dark-ale