I've got one for sale at $19.99.
It's lightweight and great for travel to the pool room. It's of a soft material so any miscues won't damage your tip or shaft.
Again...for low, low price of $19.99.
OR, if you want, just go to a machine that sales bottled soda (for a buck), drink it (or look in the trashcan beside it for an empty one), lay it on its side...and......practice your stroke. An added benefit of my product is it works on your aim.
You want to shoot better opposite handed. For (wow) again, only $19.99 I'll tell you my secret method that will produce GUARANTEED results. Well..ok, since you're all fellow forum members I'll give you this one for free as well. Hit balls opposite handed. Hit a LOT of balls with the opposite handed approach.
Sorry, I couldn't resist. I'm sure your stroketrainer works just fine. I just always thought all these random products were kind of a rip off. I've never known a good player (to include myself when I played all the time) to use any of those kinds of products.