what changes were made during Bismarcks modernization?

[hymnHim]

I am building a model of the Bismarck and was looking at the many pictures on bundesarchiv.de. As I studied the photos I seen many obvious differences between the pictures and Trumpeters Model. I compared these photos to AOTS Bismarck and it was almost like two different ships. As I studied A.J. press #1, 17-19 I seen that there are some differences after "modernization" (assuming end of 1940 early 41). The problem with the diagrams in these publications is that the "prior to 1941" are incorrect, so trying to compare differences between a wrong drawing "prior" to see any changes made "after"....is impossible. The changes I have seen are that the vents around "Bruno" were turned to face aft, the rangefinders were removed from "Anton", and around the forward 15cm gun there are "vent" stacks added ( five on both sides, I believe). Here are my questions:
1. What are the changes made to Bismarck during this refit?
2. What is the proof? (photographic, eyewitness, drawings etc...)
I really appreciate any help
Dan

[Herr Nilsson]

modifications done late 1940/1941 until Rheinübung:
Anton range finder hoods removed - pictures
vents on Brunos barbette modified - pictures
vent stacks around 15 cm (turret III and IV) -pictures
lower half of vents near catapult covered - pictures
substructure of working platform around catapult - pictures (no pictures of working platform until now)
7 m range finder on conning tower - pictures, plans -> modification of amunition hoist
radar sets - pictures, plans
2 x 2 cm flak (army) near after control station - pictures
2 x 4 cm flak instead of 2 x 2 cm flak on searchlight platform - pictures
"Bismarck bars" on foretop gallerys extended - pictures (actually there are no bars and no framework!)
small platforms for signal lights near admiral's bridge - pictures
no bow anchor (Rheinübung) -pictures
no jack staff and flag staff (Rheinübung) - pictures
number of boats reduced (Rheinübung) - pictures
...

[hymnHim]

Thank you for your reply. I am wondering where I may find these pictures, specifically the ones I have copied below? Also, I have heard that a sonor was installed on Bismarck, was it during this period? Are there any diagrams/drawings or photographs of the sonor installed on Bismarck?

lower half of vents near catapult covered - pictures
"Bismarck bars" on foretop gallerys extended - pictures (actually there are no bars and no framework!)
small platforms for signal lights near admiral's bridge - pictures
Thanks again,
Dan

[Herr Nilsson]

Thank you for your reply. I am wondering where I may find these pictures, specifically the ones I have copied below? Also, I have heard that a sonor was installed on Bismarck, was it during this period? Are there any diagrams/drawings or photographs of the sonor installed on Bismarck?

It was probabaly installed in June/July 1940 installed in. There are no pictures. There are some plans.

lower half of vents near catapult covered - pictures
"Bismarck bars" on foretop gallerys extended - pictures (actually there are no bars and no framework!)
small platforms for signal lights near admiral's bridge - pictures
Thanks again,
Dan

just a few examples

lower half vents...:
http://www.bismarck-class.dk/bismarck/w ... d_side.jpg
http://www.bismarck-class.dk/bismarck/w ... _crane.jpg

bars...:
before
http://www.bismarck-class.dk/bismarck/g ... ion103.jpg
http://www.bismarck-class.dk/bismarck/g ... tion08.jpg
after:
http://www.bismarck-class.dk/bismarck/g ... ion205.jpg

small platform...:
http://www.hmshood.com/hoodtoday/2001ex ... marck7.htm first picture

That are just a few examples you can find on the internet....of course there are much better pictures