04-07-2011, 04:57 PM
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NAR #78048 L1 - Life Member
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Join Date: Feb 2005
Location: Mars, PA
Posts: 736
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Quote:
Originally Posted by jharding58
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On the model, I think that the inner tube is a BT-20 which is 12" long, while the outer tubes should be BT-55 based on the marking guide length and each around 5" in length - if you need to replace anything.
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The BT-20 is indeed 12" long; the two BT-55 sections are each 5-5/16" long.
http://www.rocketshoppe.com/info/Es...be_List_3.1.pdf, page 18.
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John
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