Top down knitted raglan need help????

I'm using this pattern http://peonyknits.blogspot.com/2005/11/anthropologie-inspired-capelet-fo-and.html and I used really big straight needles (stupidly). Being a top down raglan, though I'm seriously running out of room on my knitting needles. I could buy huge circulars, but I'd really rather... show more I'm using this pattern

http://peonyknits.blogspot.com/2005/11/anthropologie-inspired-capelet-fo-and.html

and I used really big straight needles (stupidly). Being a top down raglan, though I'm seriously running out of room on my knitting needles. I could buy huge circulars, but I'd really rather not. I also don't know if circulars come in this size.... I was wondering if I could knit the back and sleeves seperately while keeping the rest on waste yarn until I'm done the shoulder and back increases. Any ideas??? I really appreciate any help!!
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