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Minimum beat error should in theory result in better amplitude. It may be that when the beat error is significantly wrong then the timegrapher gets confused. Remember that it's only an estimation based on the sounds heard from the escapement. You alos don't need to go OTT with the beat error. For 18000 trains, keeping it in the low number of mS is good and sub-1mS is excellent. It does not have a significant effect on timekeeping as I guess you may already know.

If you throw enough money at it, the HMT problem would resolve. I suspect that throwing an infinite amount of money at Brexit still wouldn't provide a solution acceptable to all. The first experiment is unlikely to be conducted, but the second one is a work in progress.

I have been working on some of my older pieces and today chose this 1953 Monroe. 3 step ultra sonic cleaning, lube, grease, polish and even a new old stock crystal. Running like a champ. Also show with an advert from the era and an original copy of the letter Timex sent out to service shops. This letter accompanied the 1961 service manual and registered the shop for future service publications.

not really, I'm a beginner at it as well. its essentially a lap which I've a fair bit of. The right way to work with a lap is change a lap by pressing abrasive into and it becomes a cutting tool. You only ever us it for a single grit/type of abrasive and use with a bit of oil. You usually work by moving up in grits. My plan was to make a set of tools for it as I've no idea whats there. That's based on lapping knowledge though, not specific knowledge for this tool....we'll have to get those recommended books! Levin - Practical Benchwork for Horologists Archie B. Perkins - Antique Watch Restoration

Measure Twice, With that lathe you could change your name to MEASURE ONCE. david

I think between the 10ee and HLV the 10ee is nicer just barely, but its like arguing about Ferrari and a 911 turbo, they're both friggin awesome. Very often though, the HLV is the nicer one you come across as they tend to newer than the 10ee's and they do have that nifty threading feature. The last 10ee's made a few years ago were reported sold for $100,000! A 10x20" lathe weighing 3000lbs, 10 -4000 rpm and 5hp, its a beast. Both (like most high end tool lathes) are belt driven to minimize vibration that can show up in the finish. Here's my '42 round dial (my second biggest lathe lol) with the gearbox torn apart. just so you guys can see why I'm not getting more watch work done. Also had to make a new drive for it, by adapting a 3P 5hp motor to the backdrive (2 speed gearbox down below), a work in progress

Remember to wind the watch fully then let it run down for at least 30 minutes before making final adjustments. Also, after adjustments, let it stabilise for a few minutes. After some time spent with this machine you will learn to stop chasing rainbows! That said, they can be invaluable for troubleshooting. There is a Witschi guide on line somewhere that gives a good starting point for understanding what you are seeing. There are also many incomplete tables of lift angles. I remember where this one is as I like to read the blog pages... https://watchguy.co.uk/cgi-bin/lift_angles

i ran a big EE. no gear shift, varable speed head stock, a good feature. vin

When i googled I found an informative video about them on youtube:

If you don’t have a lathe then you could improvise... an electric drill will suffice for a task like this. If the chuck is too large to hold the stock then hold a pin vice in the chuck. You can use a fine file or emery stone to remove material and just hold it gently againt the pin and move back and forth. The end of the pin should be filed to a flat point, and set the length as described below

I do, ???

This is the position for it to be to set the hands. This is not cal 462 but it might help you to understand the keyless work.

Maybe too much end shake. If the end shake is large the jewel does not engage with the pallet folk horns correctly.

There’s a list of US suppliers here https://www.watchrepairtalk.com/links/watch-clock-repair-suppliers/united-states/ But none make it as easy to find parts on line as Cousinsuk