Thanks for the welcome.  BTW - KSP 1.2.2 64 bit, Module Manager 2.7.5.  I pulled all mods except BBT, RSS and the needed RSS-Textures.  Without BBT loads great.  With BBT same fail point as described in my earlier post.  I went browsing through output_log.txt.  I don't know the first thing about it but just giving it a programmer's sniff: InvalidOperationException: Operation is not valid due to the current state of the object   at System.Linq.Enumerable.First[KeyValuePair`2] (IEnumerab
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