I've managed to get two or three broken razor handles (Gillette Old type tubes) that I'm going to take to a customer to see if they can be laser welded. I don't like the soldering and epoxy that many people have used. As part of this, I'm eyeballing trying to make, for fun, some replacement tube handles from carbon fiber. Here's my problem - I have to buy about a meter at a shot, for two inches of testing. I can't find any local shops where I could buy some scraps. I HATE wasting stuff. So, I have some questions. 1) Any suggestions on what to do with the extra tubing? 2) Anyone want some to play with on their own? 3) If it works, anyone want a handle to replace a cracked unit, at least until I run out? I don't want to do this as a business. If it works out well enough, I'll dump a handful of them to the TSD store (gratis) and let them make some profit. 4) Anyone tried it yet? Or should I not bother? Now, on to some information. Gillette was NUTS. Friction fit is understandable, but he must not have understood the tensile strength of thin brass. The tubing itself is approximately .300 inches ID (7.62mm), but the threaded knob and the base knob tend to have inserts that are closer to .330 inches OD! Rough approximations, the tubing is 19/64ths inside diameter tubing, and the inserts are 8.4mm. .8mm may not sound like much, but that's a measurement off of one already with a tiny hairline crack, but the closest to untouched. Wall thickness is .025 inches, approximately .65mm That means that the difference in the insert size to tubing size is greater than the wall thickness. That also means that the ends had to be just about hammered into place, and the surprise isn't that the tubes crack - it's that the tubes didn't crack immediately! If they'd heated the tubes, inserted the parts, then let everything cool, it might have been okay, but all of the parts were plated individually, then assembled. Heating would probably have damaged the plating and nitrocellulose lacquer. (thicker tubing might have been okay as well) I'm wanting to try the carbon fiber because it has very good tensile strength, although I'll probably have to grind out the inside a bit. I'm also trying to get a page up that I can start using for compiling data. One of the things that I've noticed is that there are lots of places with overall weights for entire razors, but not for the caps, tubes, etc; I want to real measurements. I'm anal that way. Anyone have any specific stuff they want me to measure and post up here? Assuming I have the razor in question to do the measurements? (distance between comb teeth, etc) I can't do alloy tests; I'm an IT person, not a metallurgist, but I have calipers, small scales, and a variety of other tools and toys. (if you have data, I'd love to have it) Opinions? Comments? Suggestions?