I've been using a late '40s SuperSpeed with various blades (Feather, Derby, Merkur, Personna, etc.) and I find that I'm not getting as close a shave as I'd like. I'm beginning to think that perhaps an adjustable razor is the right path for me so I'm hoping to get some recommendations. If it makes a difference, I find that I prefer the Feather blades with my current razor. Thanks for your help.