Plbab: two replies:
when sodering I push a thin piece of metal or copper under the area that I am sodering, I also use Yakkowarners method of using wet cotton balls.
when using risers I came upon a clever idea. To make the risers I use 1x4 wood cut to the aprox length that I will require to raise my roadbed. I then with the table saw or router cut a kerf about 2 to 3 inches long, about 1/4 inch wide along the lenght from the bottom in the center. This way when you put up your risers you sue a large flathead serew and a washer in the kert and then into your table. This way if you wish to make some adjustments all you do is loosen the screw a little make your adjustment then tighten again. Tahkes the flustration of taking the screws out and finding a new hole again. When you have things the way that they are to be you then take another small screw, I use 1 and 1/2 inch, drill a pilot hole somewhere in the riser and put this screw in, not it is secure. If for unknown reasons you have to adjust it again, remove the second screw, loosen the larger one with the washer adjust and just tighten again. Have used this for years and it sure takes a lot of flustration out of doing it and minimal changes can be made quickly and easily.
NOTE OF CAUTION; ALWAYS READ YOUR INSTRUCTIONS AND FOLLOW THEM WHEN USING ANY TOOLS !!!!!!! BE CAREFUL WHEN CUTTING THE KERF !!!!!!
We do not as yet have a digital camera, planning on one very soon, or I would attach a photo. Hope I explained it okey.