In this video I demonstrate the Deadeye Trainer, a device that forces you to send the object ball through a specific target. This type of training sharpens your focus and dramatically improves your...
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What are ya going to do though...
The appear to work in a similar fashion, with the 'danglies' telling how straight--or not--the ball path is. However, the Aiminator is shown as being used to practice and analyze the path of the cue ball, while the Dead Eye Trainer is being shown as on the path of the object ball. While I see that they could be interchanged for these uses, I think using either on the cue ball path is better--but I really question the use of either, with an exception.
The set up and use of either seem mostly pointless to me, because for the DET, the tool *becomes* the target. As someone else already posted, it offers no more benefit than aiming at the pocket. One thing it might do, is teach a player how to imagine and use an intermediate target--this is like the little arrowheads on a bowling lane. Still, aiming at a target/pocket farther away is (arguably) better than aiming over a
closer target on the target line.
With the Aiminator, it's nice that it has the target path aiming arrow on top, but it seems that if someone already knows how to set up the tool, then they don't actually need it. For the "exception" that I mentioned, I think a good use of the tool would be for a coach to use it, to help a novice learn with it, becuase the coach would perform the setup, and the student can then receive the advertised benefits. [Note, one of those benefits is being able to set up the same shot multiple times, which of course can also be achieved with donut labels, but the Aiminator is portable to tables where one might not be allowed to place donuts. And, devil's advocate, maybe an experienced, high skill player may also like this use, although as I already opined, I don't think they would need it.]