[Johnno]

I would also suggest - if you are using MAINLY modern type cars - look at Tyre Razor as you can do both rears or fronts at the same time. (but not a cheap unit)

I have the Tyre Razor and it is a dream to use, truing both tyres at the same time. Both 1:32 and 1:24 work flawlessly, no shaft issues, no break downs, nothing.

Which is why I find the issue with the shaft on the Hudy, here I was thinking that the Hudy was a better machine but it doesn't seem to be. Glad I have my Tyre Razor now.

[BAracer]

I had sleepless nights trying to decide whether to go for a Hudy or Tyre-Razor. And my decision was...

I'm going to start with a Hudy...

[KensRedZed]

Jeremy,

You won't regret it.

Slotloco is the first person I've heard that has cars with vibration problems after using the Hudy in stock form. I'm happy for him that he sort it out and made another axle for it. He might have the most accurate Hudy on the planet.

There are also a few tuning tricks not written in the instructions. 

[woodcote]

And if you want something alongside the Hudy to true tyres on Scalextric and other plastic hubs, there's a cheap-as-chips DIY option: https://slotracer.online/community/showt...p?tid=1909

[BAracer]

Yes, my plan is to use something like this (probably by buying a Proses, based on my DIY skillset) to compliment a Hudy.

[KensRedZed]

Strangely enough. If you true a large amount of tires on plastic wheels that can't be removed from the axle. The "Razor" will prevent a lot of burnt out slot car motors. The Razor really out-shines the Hudy in this respect. It really depends on what cars and classes you race.

Almost everything I true is mounted on aluminum wheels. Or I would need a Razor like Johnno's.

   

[slotloco]

How much vibration does a 100th of a mm deviation on the truing axle create?

Answer = A heck of a lot.  
It is the difference in our club between being on podium, and being in the back half of the field
It is 2/10ths of a second on a 5 second per lap track
It is " I can hear your tyres rumbling on the track, something is not quite right on that car" from about half a dozen guys while you are practising
It is the difference between utter predictability in the corners vs. a random deslot when you were sure you were only driving 95% towards the edge
It is the "shuff shuff shuff" you hear when you put the wheel/tyre onto another lathe with everything else true.

But you are right in that there isn't a great choice out there now for a dedicated alloy wheel lathe, and it is probably the best option readily available new for that purpose. 
The NSR is gone, the ScaleAuto sometimes has alignment QC issues, the Italian Tyre True is long gone.
Another factor for some is time, or simply the preference to do 2 wheels at once, or 1 at a time, matching diameters using a "stop"
The ScaleAuto can only do two at a time, the Hudy can only do one at a time..

You CAN get good results with the open arm lathes - RSM, Prof Motor, Tire Razor, if you put in the effort, do one wheel at a time, and put up with the idiosyncracies of a claw mount for bushes. They do also enable truing of plastic wheels fixed on axle. Most guys in our club only have a claw mount lathe. Those of us fortunate to have more, run the odd open morning for guys to use our gear, or just host
"Dear, I hear noises, there's someone in the garage"
"That's okay, it's just Paul doing some tyres, I expect he'll be inside in a while looking for coffee"

I might be the first you have heard about stating this issue of the Hudy Ken, but it is quite widely known, as least in Oz, NZ, and in the past on SCI forum. 
As I have sold 6 brands of lathe in well over a decade of dealing them, and solving users problems on all of them, so I get a pretty wide exposure.
Here you go Bourne Again...... a vision of your future
There is another Unimat SL with milling head that doesn't fit onto my main bench..... Some would call me obsessive.... I call it "small collection"
 

[BAracer]

Loco

Two trued 2.38mm axles and an Americano please.

[BAracer]

Hudy now purchased from Professor Motor. And just to report that I am not made of money, I had to sell some cycling bits on eBay to fund it. But the general consensus seems to be that a tyre truer, in whatever form, is a valuable tool for any slotracer, so now it's down to me to make the most of it. I will keep you all posted!

Thanks for all the valuable feedback.

[slotloco]

AMERICANO !!  - Bah humbug.  If you want it black, you'll have it how it comes, and how it comes is espresso, pure, unadulterated, triple shot, light roast, fresh bean espresso. My Brughnetti objects to having hot water thrown into his output.

He will with slight protest allow the shots to be adulterated with 59c textured milk, but not watered down just for the sake of satisfying thirst...
.....americano . . . americano . . . .  apologies to any from the continent above Brazil etc, . . . but really, we're talking coffee, and that is a matter of life and life... or something.

Yes, you are very right, the addition of a tyre lathe/truer, any truer used well, will improve the feel and ride of your cars greatly. 
You will be surprised at how anal you will get over time, in getting each car's tyres  " just right "