I am reminded of my youthful years when I was quite ignorant and very briefly questioned the truth of the Bible when I discovered the word "corn" within its pages. Any American schoolboy/girl knows that corn was an American crop, unknown to the Hebrews. Of course, corn is actually an old English word for any grain, not just maize. How foolish I was!
What of the Liahona-compass? God created a director-ball, the Book of Mormon says, and God had no need, any believer in Him must agree, to borrow the idea from ancient China. "Compass" is a good English translation-word that helps us understand the concept. But notice that no magnetism is ever mentioned, the device worked by faith, not science, and no Nephite copies of the thing were ever made. Why should they have been? How could they have been?
Shame on never-Mormons who knowingly perpetuate a lie in order to catch a man in what they suppose a lie, as God Himself warns them not to do! And double-shame on anyone who has known the light of the Gospel but throws it away over such trifles as barley, steel, whatever. How do you feel learning that massive, pre-Columbian iron slag heaps have now been found? Do you feel silly when you realize that your quotation of "an endless number of horses and chariots" from 2nd Nephi, rather than being an anachronism of the New World, is actually a direct quote from the Biblical book of Isaiah, and thus perfectly in place amongst a group of Hebrew emigrants, whether there were an endless number of horses upon the land or not?
There is an LDS chapel somewhere in your city -- you are welcome, or welcome back, next Sunday.