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The 3 inch strop is easier to use when starting out because you can fit the whole length of the razor along the strop and not have to do an X-stroke.

Looking at the Dovos you linked to, I think...

+1 on Redcane's suggestion on getting a new razor from SRD. An SRD razor comes professionally honed. It would hence be shave ready once you received it. It would also gives you a solid idea of what...