Almost everything up in these parts is totally natural. I only know of two places where there are manmade fish structures. Both of them are the pvc porcupine type and they both hold fish. Funny thing is that one of them continually holds slab crappies in the 12-15 inch range and the other spot holds lots of dinks. I am thinking the one that holds the slabs is just better located. The one with all the dinks is in about 5 feet of water in a canal, several hundred yards from the main lake, or any water that is over 6 feet. The one with the slabs is is in 9 feet of water and on an inside corner of a near shore drop and is less than 5o yards from a 23 foot hole. I think in that particular situation, the spot that holds the slabs would naturally do so just because of its' natural location.
It is not about the equipment you have to use,
It is about how you use the equipment you have. :D