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Autopsy Article

TackleTour Autopsy: One tough crank, a look inside the SPRO Little John DD (continued)


I stepped up to a rougher file and started to scratch the surface of the Little John DD, but I had to apply so much pressure that during the test the file actually bent! It reminded me of doctors trying to give a shot to superman, this mean little lure simply wasn't having it!


So tough that it took so much pressure to damage the finish that the file bent...


...and the lure still showed almost no sign of damage. It did look angry though


Though the Little John DD survived our abrasion tests the bait would be no match for a diamond tipped rotating blade. It was time to cut the lure open and take a closer look at that silent tungsten weight transfer system.


Cutting the lure open from the underbelly


Once cut open we were greeted by not one but two weights. In the center of the lure is the Tungsten ball weight which is able to move back and forth in the lure and in the belly of the bait is a lead weight that is fixed in the center. This weight not only aids in casting but helps the lure sit at just the right angle when it is retrieved or at rest.


Cracking open the lure exposes the lead weight which is fixed into the center of the lure


Above the lead weight is a long plastic channel


The tungsten ball is actually a mixture of rubber and tungsten, this mix gives the ball plenty of weight while remaining completely silent. In the center of the lure there is a channel that allows the ball to move from the very tail section to the front of the lure directly below the lip. This system helps the lures movement, helps balance out the lure and gives the bait extra weight in the tail for longer more accurate casts.


The tungsten weight is able to freely travel from one end of the lure to the other


There is so much rubber content in the tungsten weight that it bounces when dropped


The ball is almost perfectly round and does have a high content of rubber, so much that it will actually bounce when dropped. This ability to absorb shock allows this "weight" to move back and forth without creating unwanted noise and vibration.


Pressed flat...


...with no pressure the weight returns to shape. This weight is able to absorb a lot of shock making it ideal for a silent transfer system


We put this little tungsten weight through a range of tests and found it to be extremely resilient. At the end of the autopsy we finally cut the weight in half and immediately the tungsten particles were much more visible. This clever combination of rubber and tungsten make for a very reliable silent internal weight transfer system.


Cut in half the tungsten content is much more visible


The original SPRO Little John was a mean bait and the larger DD version is much the same, just on a bigger scale. I've been field testing these deep diving baits for about two months now, and while the field tests are far from complete the autopsy did shed some more light on the lure's overall design. The Little John DD features a simple yet effective weight transfer system and at the heart of this bait is the rubber + tungsten weight system that allows the lure to not only cast better but gives the bait a silent and more subtle action. The other thing that really stuck out was just how durable the finish is on this bait, there's a reason the Little John DD has angry eyes, this is one tough "Little" bait!


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