Glad I could help.You have given me a wealth of information sir. Sun will not be an issue as my rack will be on a north-facing wall. I ended up getting a 24-pipe rack by Decatur from Etsy. I understand the lower rack will probably be limited to straight pipes. At least half of mine are straight. The other half will go above. And I will have room for growth. Thanks for your lengthy and considerate response. Most informative.