Delaying Graduation and Re-Recruiting?

Aight, so here's the low-down.I'll be heading CSFB for my Jr summer IB internship. I'm fairly confident that I'll be interning in one of their top groups (M&A or FSG). Given all of the uncertainty with the firm, I'm considering whether it would be worth it to delay my graduation a semester and re-recruit for Jr year internships. It seems like it would be a good hedge against potential scenarios where CSFB has extremely low return offer rates or doesn't perform as expected. When I recruited initially, I was attending a non-target, but I recently transferred to a lower/mid tier Ivy (Cornell/Brown/Dartmouth) and so I now have target OCR and networking, which also factors into the equation.Pros: I'd be able to take another shot at getting a top BB/EB. I'm optimizing for exit opps, so this would be helpful. I'd avoid the generally turbulent market conditions and do my Jr summer internship during a more stable economic period? I'd also be able to hedge against CSFB headcount reductions, which have apparently impacted Jr level employees. Last one - I'm already on a tight schedule for graduation, so it would allow me to reduce per-semester point load and thereby likely increase GPA. Also, I'm familiar w the recruiting process and so preparation seems like it would be straightforward.Cons: At least one additional semester in school (though it can be a positive, as mentioned). Possibility of a 6 month break if the bank won't allow an early start (do they usually accommodate something like this?). Could also be argued that it screws over CSFB if I go through the summer internship knowing I'll be extending school and this couldn't accept a FT offer.For those in the industry, those who have done this, and those at CSFB and familiar with what’s happening at the firm in terms of hiring, what would you recommend? Ultimate goal is UMM/MF PE. I'd like to go to b-school so the GPA piece is also nice.