Here is information about the different style of towers like self supporting or guyed. This article is a great place to help anyone get starting in putting together a tower project.
If you see an error message stating that your credit card is invalid, this has most likely happened for one of the following reasons:
1. You have incorrectly entered your credit card number.
2. You have incorrectly entered your CVV code.
3. You have incorrectly entered your expiration date.
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This is due to the internal process we must maintain to properly track your order through the system. Once an order number is assigned you may use it for all future references to that purchase.