Admiral; thanks, the kind comments on here really give my confidence a boost.
Knightkrawler; your so right on the flash issue. I must learn to be more patient and not skip that step. I can see it would be worth it in the long run. I guess i'm so eager to see a miniature finished.
Showdown; i have given the small room issue some thought. I'm determined to have a wall there. I guess the guy who designed the Heroquest board wasn't giving much thought to the people who were trying to build 3d versions of the board 20 odd years later!
Here's what i plan. Every room has a 1/4 inch border around the edge, from what is left over from the wall tile. The small rooms will have to sacrifice that space in order to allow space for the extra wall. I could use the 1/4 inch fieldstone walls to create more space but this wouldnt match and i would have to make seperate door sections to fit. Below is a rough diagram, i know the tiles wont exactly be in line in the small rooms but only 1/4 inch out.
image.jpeg