09-16-2018, 08:39 AM
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Master Modeler
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Join Date: Jan 2009
Location: Fairbanks, Alaska
Posts: 6,507
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Jeff, thank you very much for this information, and for posting the MRI catalog's table! (I had forgotten that MRI was the predecessor of MPC and AVI--cudgel my memory--but Asallam bless yours!) In the picture in Stine's 1977 book, the adapter does look almost "square" (nearly equal in height and maximum width; due to the camera angle, it's hard to tell by looking whether the height or the maximum width is the greater of the two dimensions), and since the lower body tube--and thus also the wider end of the adapter--was 20 mm (0.787") in diameter, it is in excellent agreement with the given length of 0.75" (2 cm) for the adapter.
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