The alumacraft 12′ flat-bottom jon boat features 4 extruded aluminum ribs and pressed-in chines for strength and great tracking.. *all images may include upgraded options* 18’4″x66″ sled starting at $28,495.00! including 90 evinrude e-tec pump and tiller. this is the perfect sled for those. Scroll down this page for many more plans. this a page of links to some favourite free boat plans at intheboatshed.net. they’ve been chosen because they are derived.