Gino,
Thanks for all that; all very evocative when, as a 17 year-old soldier I was sent for a briefing North and South of Helmstedt. I remember a minibus full of young soldiers like myself, all newbies to BAOR. The Inner German Border was a revelation, and not in a good way! All that effort to keep a people in. It made a huge impression on me and perhaps that was the purpose; so at least, if it came to fighting, we'd arguably know what for. I can still recall that rather misty, gloomy Autumn day with a couple of the towers (BT-11 type) visible, a Robur truck around 100 meters away and 2 Border Guards only 20 meters or so in front of us, clicking away with their cameras while we were lectured to by a member of the British Frontier Service. I don't know quite why but I felt somewhat sorry for the Border Guards and I mustn't have been the only one as a couple of the guys threw some cigarette packets over the border to them (when the BFS officer wasn't looking).
Anyway, long story short; it may well be possible to scratch such a tower, as you say perhaps using the 1:43 version as a plan, but to be honest: those subtle dimensions of the top, where the windows sort of flare out, I don't know. I find my self pushed to cut a straight line in plastic card. I can embellish a model, add the odd resin replacement part, but scratching, I just don't know.
Anyway, thanks for the input, and again, apologies for such a thread hijack. As for the Berlin Wall sections, I'm actually in the process of finishing a small dio using them, the Panzershop Trabant, and the excellent figures from Valkyrie. But if only that tower....
Brian