Thoughts on IPA

I’m getting ready to brew an IPA today.  Just got a hopback and it will be my first time using it.  Before I get started, any thoughts/opinions on the recipe are greatly appreciated.  Also, this is my first post on the board  :).

Batch size: 15
Boil size: 19.8

Preboil SG: 1.058
Expected OG: 1.065
Expected IBU: 72

Grain Bill:
37 lb Briess 2-row (93%)
3 lb Briess Caramel Malt 40L (7%)

Mashing at around 155. hoping to preserve some dextrins for mouthfeel and some residual sweetness in finished beer.

Hop Bill:
3 oz Centennial Pellets  8.6% AA @ 20 minutes = 20.16 IBU
4 oz Centennial Pellets  8.6% AA @ 15 minutes = 21.22 IBU
3 oz Centennial Pellets  8.6% AA @ 10 minutes = 15.92 IBU
7 oz Centennial Pellets 8.6% AA @ 5 minutes = 14.85 IBU

Hopback: 8 oz Citra
Fermenting in 3 different buckets with Safale US-05, WLP001, and WYeast London ESB.
Each bucket will dry hop with 1 oz of amarillo and 1 oz of cascade.

WELCOME to the forum. recipe looks good to me. I personally move the 5 min. addition to 0 min.

I second that suggestion.

Thanks for the welcome, guys.  Is there a difference between a 0 minute addition and a hopback?  I assume probably not a huge difference.