Has anyone had trouble with speed on their tt

The experience you describe goes beyond simple speed stability issues since most turntables of repute are within reasonable limits.

Your controller switching speeds on a whim is a reliability issue and there have been quite a few cases discussed here and on other forums?
One possibility I would consider carefully is static discharge during handling and operation of the controller. If you have a power block with an external earth binding post nearby, it might be helpful to briefly "ground" yourself as a precaution against damage each time you operate the turntable?
If your supply is already damaged I'd be inclined to get it checked by the manufacturer. No point in suffering any longer! :(
Hope this situation improves.

Kiddman, there are no motors or turtables with absolute speed stability. Every motor is subject to "kick & coast" - the effects of which cannot be completely removed. It would be nice to think it could be engineered to be 100% non-cogging but it can't.

Even high-tec radical solutions to compensate for inherent issues of suspended chassis tables such as the Kronos which uses counter rotating platters are still flawed because the basic engineering cannot be accurately balanced e.g. weight & tension of materials etc.

To give another example, an Avid Acutus would be one of those poor candidates you mention but I would cheerfully buy one today.

“Slow Death by Timeline .”
I’m not a turntable designer but taking servo controls out of context without considering that flywheels and rubber belts influence stability is, to my mind, misleading at best.
To assess a design you need to look at the whole design not just one element of it. Anyone not doing this has an agenda.

In the best of humour, to the Timeline Fanatics, I’ll play one that beats you .
A digital system, when the output is rendered, has a perfectly clocked timeline. It has an accuracy that no analogue system can match and is far better than any Timeline tested example.
The level of jitter is usually, at worst, of the order of hundreds of picoseconds or a nanosecond. This equates to a vanishingly small speed error.
Does this mean that the pitch stability of my digital replay is so good that I instantly comment on it and prefer it to those turntables of “ill-repute” deemed unworthy of merit?
H*LL NO!!!!!!!!!!!!! :D ;D
Those “unworthy” turntables are by far preferable and pass the only test which is important : they involve me in the Performance to the exclusion of all else.
If, as a result of Timeline inspired disillusionment, anyone would care to sell an unworthy turntable of ill-repute at a knockdown price, I’m here. ;)

Of course, Timeline fanatics could, if they wish, dispense with the LP altogether and watch the turntable rotate in preference to listening to music?
The Timeline hype reminds me of the Philips “Perfect Sound Forever” marketing blurb which obsessed about surface noise on LPs. Before you knew it, every listener was holding their breath focussed intently, not on the music, but waiting for the next click or surface imperfection to occur. At a stroke, the marketing changed everyone’s perspective. They had successfully persuaded most of the consumers to stop listening to the music and focus on background noise instead. It took years for the population to re-learn that analogue wasn’t so bad after all.

We don’t really want to go there (again)? (Do we .?)

Thanks Mosin but I’m not dismissing any turntable. If users are happy with their Timeline compliant TT that’s great news.
You’ve indirectly summed up my feelings : Everyone should be happy with their TT choice because they chose it. (Timeline notwithstanding).
Let's just say I'm encouraging a little less automatic blanket demonisation of the turntable designing community, which seems to have been an unfortunate consequence of the Timeline Thread.
These issues appear to be taking over the OP’s Thread when it is clear his past/present problems go beyond simple +/-0.02% deviations between turntables or regular and repeatable behaviour of a fully functional power supply?

As an aside, the Rockport Treatise on turntable design was written over a decade ago (and it is wonderful reading). It’s likely that others, apart from us, have read it.
It would be foolish to think that being able to comprehensively describe design problems automatically implies the power to solve all of those problems.
I believe Rockport had a good stab at it (although you'd be struggling to get one now unless you are a millionaire). The new kid on the block – The Beat – is already up to Mk IV/V(?), so it isn’t THAT easy???

Marketing is a powerful tool and Timelines must be flying off the shelves at the moment.
At the end of the day it is just a strobe. An accurate one but a strobe nevertheless. My strobe gets used once then sits in a cupboard for 3 years. (Ok the Timeline is also a record weight but clamps & weights are not always desirable in all circumstances. Indeed, the designer of The Beat claims he tested most of them and is of the opinion that if the turntable design needs one then it is fundamentally flawed(!!)
Granted, that’s only one opinion - two if you include mine – because I’ve always disfavoured them on the grounds that they “stressed the vinyl”, perhaps not quite the same reason/s as his :)
Of course, the Timeline is removable and storable in the cupboard for 3 years. :)

Digital has a perfect timebase but we prefer the imperfect. That’s my core message. (Timelined or not, still crude)
Never thought I’d see the day I’d be using Digital to strengthen an analogue point. :) :)
Nice to see it’s good for something ;) 

Finally, I think some of my Timeline remarks, although humorously intended, were slightly inflammatory, so I owe the lads an apology if the comments caused them any grief.
(In fact I thought the reactions exceptionally kind and polite, all things considered. Hope I will be welcomed back!
All the best....