To keep you from continuing to talk to youself.....I thought I'd chime in.
First off, I'm suspecting you've got an SH4 v1.5 of the game.
I'm also assuming that with no mods "activated" through JSGME, you've checked your integrity of the "main" game files and all is OK? You do this by opening JSGME and click the "Tasks..." menu heading found in the center of JSGME. Use the "Compare Snapshot" to check your game file comparison with the "Snapshot" you took just after installing JSGME. Didn't take a clean install "Snapshot"?......Reinstall the game completely, and take one! To make a clean install of the game, you'll need to make a clean delete of the game....follow
this advice. Follow the added comments I made
here regarding AVG's sticky.
By now, I want you convinced your main game files are as you've installed them.
Since I've not downloaded the
Historical Prop Rotation Mod before today (I'm also assuming
this is the correct mod), I'll get back to you on what you've found regarding the gun placement on the Gar.
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Later today.....
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Upon loading the HPR mod with a stock Silent Hunter 4 version 1.5 game (no other mods loaded.....stock game "Comparision with Snapshot" showing no files have been added/changed), I started a new Campaign using the Gar at the beginning date of Dec. 1941. This is what the Gar Class USS Grayback looks like:
Sorry, but I don't see a problem. The simple issue is your trying to use a mod that's designed for the stock game only.....it's not to be used with TMO or anything else.
The "Snapshot Comparision" in JSGME can tell you what's been "Changed, New, Missing, Same" with its final report. Unlike the image below,
do not have any mods "Activated" in JSGME when you either take a "Freshly Installed Snapshot", or when you make a "Comparision of the Snapshot" to what stock game files you have now.
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Still later:
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The following image is with TMO 2.5 and the HPR mod added together:
The gun is where it should be.
I compared the two mods, finding you shouldn't use the Historical Prop Rotation mod with TMO 2.5 anyway.....the prop corrections are included in TMO already! You will lose other modifications that TMO has made to the subs .dat file by over riding them with the HPR mod .dat file.