a good friend of mine was the one who got a original patent on the ulta jack. If you are looking to add a jack plate to your boat to make it run in VERY low water than I would recommend one. I may be bias ,but I have seen them added to boats and it makes a dramatic difference. Boat builders have kinda stole his idea behind the ultra jack by building boats with a tunnel and adding that "skag" to the tunnel. He stills makes a few ultra jacks on special orders but I think he mainly builds regular jack plates for all the local boat dealers. If you are interested let me know and I can get you in touch with him.
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