Too bad, by then I will be in Sicily. Sigh...
By the way, Spanish horses do have had their necks bred for centuries to shorten and curl up nice and high. Just as they have been bred for a high and impressive frontleg movement. Why were they? Because a horse who naturally curls his neck and steps up high always look impressive, also when uncollected and with a bad rider on. For the gaits another reason is that upwards instead of forwards legmovement is more comfortable to sit on, even when the horse is stiffbacked and hollow. Where you in the latter case would be shoved off a big warmblood by the force of the gaits slinging through his rigid back, on most of the baroque horses you can sit quite comfortable in the hollow of a tense back. So because of how they were bred their default mode when stiff-backed so to say is neck high and curled up, and frontlegs stepping up high. So if he does allow his bakcmuscles to relax, the neck will fall downwards, but still be curled up. Only when the horse also dares to relax all his neckmuscles, he will move his neck downward with his nose on the vertical. Friesians have a similar problem, and actually more exaggerated because they were bred as coachhorses and were selected for almost vertical necksets with the 'curl' only being at the upper half of the neck (the so-called teapot necks). To them the rollkur is a backrelief, but the neck essentially stays stuck in its wrong default position, even when the head is low: the nose is pointing towards the knees. I saw Tineke Bartels show the benefits of the rollkur-system on her Friesians last year (during Horse Event), and it was very clear that although the horses stretched their backs (up to a point that the hindlegs were more drawn up behind the body than placed under it (another thing Friesians were bred to so, as high-stepping coach horses), their necks stayed crooked and even when drawn upwards into the regular collected dressage neckset, remained curled up and never had the poll as highest point or the nose near the vertical. If a horse is bred for curling up his neck (which a lot of breeds are), then a rollkur system will never learn them to get their nose forward to the vertical again, because these horses have tense neckmuscles with the biggest part of the tension being in the lower neck muscles: and they pull the head and nose in. And a round, deep, curled up position only trains these lower muscles to become stronger and be shortened even more.
Off course every individual is an exeption
, but breeds have always been selected for special features, and most of these features were bred because they made the horse look impressive even when the rider wasn't, Think of the 'naturally' extremely high-stepping gaited horses, the extremely big moving warmbloods, the springy arabians, the low-necked and flat moving Quarter horse... All these horses bring in naturally what you are essentially told to achieve as a rider. The western rider's riding style is based on the idea that his riding system makes the horse a cool, calm, low necked, flat moving horse. It comes in really handy when the horse does all this already.
Just like dressage horses: every old riding teacher will hammer on the fact that every horse can master dressage movements up to the grand-prix level, because you gradually teach the horse how to extend his movements, and how to collect them. But that takes years. If the horse is a really big forward (warmblood) or on the other hand upwards (baroque) mover already, things loook impressive already before you start, and you can skip at least half of the lessons. At least, that's the idea behind breeding for special purposes, and that has done it's job for centuries already.
And then even when you have two paper-less shetlands, they both bring along so many exterior flaws that you have to work around all the same problems in them too.