Hello out there. I've been working on a little 4" table saw project for fret slotting (saves a ton of money on blades over the larger table saw offerings and a dedicated unit is always set up and ready to go at a moment's notice). I think others could benefit from a little deal I'm working on with a blade manufacturing company. I made a small 4" table saw (easy to do for cheap - will post pictures later), but there are a few on the market already (Dremel used to make one, Proxxon, MicroLux), though I hear the Harbor Freight version isn't worth it due to the ridiculously low-powered motor. There's a company called Thurston Manufacturing out of Rhode Island that makes a .023" kerf 4" diameter blade with a 1/2" arbor (model 121). I bought a couple (about $20/ea) and they're great, but have tiny teeth, with extremely small gullets. They cut well, but load up really quickly and heat up a bit, causing the resins in the wood to cake on the blade. Having to clean the blade after every use is less than ideal. I noticed Luthier's Merchantile uses a 6" version of the same style blade, but the teeth and gullets are almost exactly twice the size. After determining the teeth size/spacing, I called Thurston Manufacturing and asked if they could make something similar in a 4" blade. Turns out they already have a 4" blank with that tooth size and spacing that just needs to be thinned down to .023" kerf width. I'm waiting on a quote, but I'm positive the pricing will go down as the quantity of blades ordered goes up. I'm hoping they'll offer them at $30/ea or less (the other ones are $16.50 or so before shipping). FYI, for those interested in building a 4" table saw, I bought some 1/2" shafting and 1/2" ID bearings on amazon for $8 and $4 respectively, made some bearing blocks out of hardwood, made a box and table saw top from MDF, bought a 1/2" arbor adapter (needed some truing), made some pulleys out of MDF as well, small 1/4" v-belt, and the whole thing ran about $35, minus the motor. Oddly enough, you probably want to aim for 1/2 hp or 3/4 hp if its a 1725 rpm motor (good idea to step it up to about 5000 rpm with pulleys, which eats some power). My 1/4 hp motor just didn't cut it. If you have a 3450 rpm motor, you won't have to step the speed up nearly as much, meaning less power eaten up by the large pulley on the motor, so 1/4 hp might cut it in that situation. Better to go a little too big though, as most of us are trying to speed up the fret slotting process with a build like this and having to slow down to let the blade cut kind of defeats the purpose. ***UPDATE*** I got a tad impatient waiting on a reply from Thurston (they've been great, I'm just not known for patience when gathering supplies for a project ). I discovered another company called Malco Saw, so I called them up. Turns out they make fret slotting blades for Fender. He said he could make me a 4" x .023" x 1/2" arbor blade with the same style of teeth Fender uses and get them out quick for about $23/ea. I spoke with an employee named Greg and he was great! I'm waiting on the blades and a link v-belt, but after I get things all back together I'll post pictures.