I love J.W. Hulme luggage and kit gear, but the cost is very steep, since it's hand made and with high quality control of the finest leather and canvas. I own a bunch of their luggage, but not their travel kits or DOP kits. For these, I just get leather or canvas or leather/canvas from other sources at 1/4 the price of J.W. Hulme.
I found an amazing DOP kit at a Marshall's recently (genuine leather) for under $20, and that's the way I like to find toiletry kits. These get the most abuse, so no sense in spending a fortune on them as they take the most abuse of all your luggage..... unless you are checking bags. Then the bag that's checke gets abused considerbly more times than not. But I'd NEVER check any of my J.W. Hulme luggage. All of it gets carried on. I only check luggage that would not breat my heart if it were destroyed, lost or stolen.
REGARDING STRAIGHT RAZORS AND FLYING;
I'm wondering if TSA would allow Shavettes to be carried on? These after all are razor blade razors, not hard blade straight razors. I'd suspect they would say "NO" since you could theoretically put the blade in the shavette and use it as a weapon, whereas a DE razor would be a bit more difficult to make into a weapon. Still, I may ask them to see. I'm not a huge fan of Shavettes, but they are better than nothing if you aren't checking luggage and want to go with a straight (ish) razor.
EDIT:
Just checked with TSA. No single razor blades of ANY kind are premissable onboard an aircraft as carry-on luggage. Not DE blades, not singles for shavettes, nothing. The only blades allowed are cartridge blades and disposable razors. You can bring on the shavette without the blade (be prepared to have it looked at with scrutiny at TSA checkpoint), but must check the blades or buy them when you get to your destination. This is odd since I have definitely brought on razor blades for my DE before. They just must have squeked through. So that ends that discusion. No biggie if I'm going to the mainland for weeks. I could carry on a shavette and buy blades when I get to my destination, or better yet mail them and have them waiting for me at my destination when I arrive.
Straight razors obviously need to be in checked baggage, but we knew that.