The only U boat article I found is a second part which I be;lieve you said you had acessed The first part is in the December 2000 RMC which I have not located yet,but will give you a place to start looking.
I looked for my 2000/2001 issues of RMC and did not find them I will be checking in the 2nd floor reading room this afternoon.
In around 2000/2001, I believe a pair of articles appeared, probably in RMC, concerning narrowing the hood on Athearn U-boats. I have the second installation, have not sourced the first. Does anyone have the Reader's Digest Condensed Version/thumbnail sketch of this article?