Posted this question in the razor blade forum but I'm not sure anyone goes there.

Until a couple of days ago, was using Derbys and having a pretty good experience. Then I dropped a 7am in my Fat Boy and found it quite uncomfortable. The result, with all settings on the razor and my pre-shave routine the same was a lot of pulling and some significant razor burn. Today I tried it again, with a better soap, being particularly careful to make sure I was well prepped and the lather rich. The result was better but not great.

I'm wondering if the problem could be the combination of Fat Boy with 7am. Will try it tomorrow in my Tech which gave such an effortless, close shave with the Derby. If others have thoughts on the 7am, would be interested in hearing them. Thanks.