1-What is the scale on your map? 1 inch = ? miles
The entire map is 21x32 miles.
2-What are the source material for these red lines on your map?
-The Ruined Tower
-Tomb of Alaxus
These are all from the D&D Fast Play product line:
* 11331 Wrath of the Minotaur
* 11373 Eye of the Wyvern
* Crypt of the Smoke Dragon
* Fast-Play Game
They are marked in red, because they are not officially placed within Thunder Rift, but in another micro-setting called the Vale. I included them into Thunder Rift because the Vale was never developed much beyond those few products which very few people own anyway.
3- Which Dungeon issue is Stonefast located, and is it available online?
Stonefast is from the "D&D Classic Game" boxed set published sometime in the 1990s. It is a follow-up to Zanzer's Dungeon, but very little information is given except for a dungeon map and the fact that it was build by dwarves. As it is connected to Zanzer's Dungeon, I figured it would have to be close to Kleine.
4- How many miles are between Specularum and Milinir by river in your GAZ 1 map?
(I located TR on the Northen Easternmost mountain hex; right in front of a Ylaruam hill hex, one more hex north and it reachs a road hex)
About 240 miles maybe? I havent been too specific about it, but I placed it up there in the upper northeastern corner of the Karameikos map.
5- Are any of the white lines on the map, not found in the core TR 32 page module?
from Duingeon #41 is not there, and also some of the locations from the various Thunder Rift modules may have been mentioned or not but were not placed on the official map:
Harpy's Nest (Not a separate module)