Battleship 3D Wooden Puzzle by Puzzled Inc

Poor quality material and incomplete instructions. “Put all parts together by following the right order of numbers. Shown on the diagrams. Join pieces by inter locking the exact areas together that have the same number (1 to 1, 2 to 2, 3 to 3 and so on )” Nothing is said about parts with letters, ie, a.b.c.d… Making it worse, there are no numbers or letters on the actual part. One must look at the printed diagram to identify each part. When it comes to “interlocking the hull parts" ie 1 to 30, there is no clue as to sequence or part number for internal parts. This would have been my seventh wood puzzle but I doubt it will be finished. It was one of three I got for Christmas so on to my eighth, much larger interlocking puzzle.