Nice steam plant. I hear a little bit of knocking, maybe I have wrong so is not mechinal sound, why that happens for I have a Stuart Victoria and also hear knocking sound from this engine. Are you from Sweden? Your name tells me so can it be.
The small brickwork was found at a local hobby store's doll house section. If you search "Houseworks 8201 doll house brick" you should find it pretty easily. It comes as a sheet with a mesh back. I cut it to suit, and used J-B Weld to adhere it to the fire box. J-B Weld works great, it can handle the heat. Then I used floor tile grout applied by hand and wiped off with a wet rag to create the mortar joints.
