Like Scott say's, if your way works that's all that matters. But also bending the flexible blades gives you more options. so dont change TO double edge blades, just add them to your arsenal.

I but them at Wal-Mart. ONE little hook in the 10 feet plus isle space of disposable razors, takes a while to find them but they are there. Every drugstore (Walgreen, CVS, RiteAid etc.) should carry them.

also look for the Stonefly blade holder, MUCH safer than working with a plain blade.
http://www.veniard.com/s_product_ima...%20trimmer.jpg