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So you're saying that if you, say, put a cellophane sheet at 100 and a target at 600, the MOA size on the cellophane would be larger than the MOA size at the target?

Unless you're threading at like 500 rpm, you'll have plenty of time to find your spot. I mark it with a sharpie just to be sure I get the right one.

Get yourself a COGSDILL BURRAWAY tool or three. I've found those indispensable--especially when cutting 8-40 scope base holes.

It's a Deublin rotary union I got used from ebay for about $25. They pop up on ebay fairly regularly.

It's a PTG: http://pacifictoolandgauge.com/reamer-holders-arbors/9124-ptg-standard-floating-reamer-holder-head.html

I built mine from a carbonation pump and use water based coolant in mine. I had to actually lower the pressure by replacing the spring in the bypass section of the pump. At shutoff head, I think it maxes at about 20 psi, but it moves a ton of coolant. Here's a video of the system in...

I have the Jet JMD-15 which is essentially the same as the Grizzly G0705. It has a round column, but I don't find it much of an issue. I suppose if you try to use the column as a "knee" then yes, you will have issues with head movement. I set the column where I need it and lock it down. I...

The best way to ensure the bolt is true to the spindle centerline is with a collet. Of course, this requires that you remove the bolt handle, but they solder back on just fine--unless you had them TIG'd.

My fixture is just a 2 inch piece of aluminum round stock milled half-round for about 3 inches and a V slot cut into it at a 22.5°. From there, I tapped a few holes for a hold down and a small adjustment scree to get the handle aligned correctly. All other alignment is just done in the 4-jaw...

I don't know why people dis on carbide so much. I've had nothing but good results with carbide threading inserts. I use full-profile inserts, mainly Carmex or Iscar at 100 or so RPMs.

You need to learn a bit about the terms and tool geometry too. That's not "rake", that's "clearance" or "relief". Rake is a different thing altogether.

I'd have guessed that they were just silver-soldered. They seem to come loose at what I estimate to be about 700-800° F (based solely on my experience with oxy-acetylene and silver-soldering). I don't even bother with the heat-stop paste anymore.

If you're going to be pedantic, then it's any hydrogen nucleus, not just hydrogen ions.

I use water-based coolant (Hocut 795MP-RHS) for all the operations I used to use cutting oil for except for threading. I still use sulfur-based oils for threading. Chambering was the most recent changeover. I have a through-barrel system now and I love how the coolant performs.

Is anybody but me using water-based flood coolant?

Did you mean to include a picture? I have a couple of Manson reamers and they are no different than PTG as far as pilots.

I use the same system for a general purpose flood coolant system when not chambering. I use a carbonator pump I bought used on ebay. They are nice because they have a built-in relief valve in the pump itself so no need to mess with a relief and return system. Other than that, I use a 5-gallon...

I just use a short piece of vinyl tubing and some hose-clamps. Vinyl is flexible enough to fit a wide variety of profiles. A little soak in some hot water and it'll slip right on.

I didn't say just as good, I said good enough. I agree that the Noga has a lot better feel to it (including the locking), but the knock-offs are "good enough" and you don't cry as much when you break it.

I have a couple of non-TIG welders from Miller and Lincoln that are built like tanks, and they are nice machines, but when I was in the market for a TIG, the Eastwood TIG200 caught my eye. It was on sale for $699 and came with a 3 year no questions asked money back warranty, I figured I had...