BTW, CHristy, what type of blades do you have? Do you know how much they cost?
On mine too, the runners were too thin for the unmodified Pro-Filer. In addition, Pro-Filer's maker (Edge Specialties) has been somewhat inconsistent in the size and centering of the gap. (Nonetheless, last I knew, you could tell Edge Specialties what gap size you wanted - so if you have precision equipment - a good calipers or micrometer - you can measure the width, increase it slightly (a few thousandths of an inch), and make it snug.
The extra thin runners is why I lined each side of the gap of the holder with tape, to get a snugger fit. (You can instead put tape on each side of the blade where it would touch.) The Pro-Filer set comes with masking tape, but if I remember right, but it was too thick for my blades and tools, so I used Scotch plastic tape.
I also take a few swipes in one direction, take the blades out of the gap, and turn either the skates or the pro-filer around 180 degrees, and take some more, and repeat. It evens out anything, if there is a slight asymmetry (imperfect gap centering), or if something about my technique is asymmetric.
It took me some practice to get the technique right. But think about what she is doing now. When she changed to a shallower ROH, the skate tech doubtless took a fair amount of steel away. A few more experiments like that, and she may as well buy new blades.
AFAIK, none of the Matrix blades have the type of thickness modulation that makes sharpening with Pro-Filers more difficult.
BTW, don't order the hockey kit - order the figure skating kit. Hockey blades are much thinner than figure blades.
One thing the Pro-FIler is not useful for - changing ROH. You would mostly wear down the coarse stone (I did that once - I told you I made initial mistakes!), and spend a lot of time doing it. So she would need to pick an ROH, and get the commercial tech to grind it.
I think it would be worth it for her to try. Because she is letting the dubious skate tech destroy her blades, which likely cost more than a Pro-FIler set, and is losing ice and lesson time, so she is probably spending much more money using him. I find it hard to imagine a tech so bad that her blades would stick. Sure - she could grind off the burrs, if that is the only problem - but anyone that bad is almost certainly messing up other things too. Rather than her trying to teach the tech how to sharpen blades right, on a machine that takes off a lot of metal if you do it wrong, she should just do it herself, on a tool that takes off less. It would be hard to do worse than he has done.
BTW, Christy, if you want a cheap and dirty way to try sharpening yourself, and the skate tech has gone all the way to 1/2" ROH, you could use the Berghman skate sharpeners:
https://www.ebay.com/sch/i.html?_from=R40&_nkw=berghman+skate+sharpener&_sacat=0&_sop=15They are cheaper - on the order of $5 to $10, maybe $15 if you want a slightly more recent one. The stones that come with them aren't great - they are old and crumbly, and too coarse grained to get extremely sharp blades, though you might find them sharp enough. In every other respect, these old tools were actually better than Pro-FIlers. They had adjustable gap size, so would fit your blades (though I would still use tape so as not to scratch the blades); they let you move the stone right up to the edge of the tool, which gives you better control, especially near the toe pick (but tape the toe pick so you don't accidentally trim it); and it only takes a few seconds to replace the stones. They used to be considered serious professional grade sharpening tools - but then people started making powered sharpening machines that let skate techs sharpen more blades/hour, so Berghman went out of business. If you are reasonably happy with the results, but want them even sharper, replace the stones (abrasive cylinders) with ones of finer grain, made with modern materials - you could even use the replacement stones that Edge Specialties sells for use with Pro-FIlers, though there are cheaper sources.