My thought process here are for those who are in a good equity position.
It would seem taht if I could pay off 100K on a a fixed rate product at 6.125 with Equity line at 4.125 I should be able to recognize an interest saving of 2% on that 100K with a minimal amount of risk. It would appear to be a saving of about 2K in year 1 alone using very rough math. I am not factoring loan amortization, Timae Value Money, Opportunity Cost of capital etc.

Just seems like there is a good arbitrage situation here to reduce financing costs.

Like the Sunday Coupon Section. When I see a coupon for 99 cent eggs I cut it out. Seems like there are some coupons available for those willing to cut them out. Only the savings are a lot greater.