A simple and effective way to ballast...

[doctorwayne]

I should have mentioned that if your water is especially hard, an alcohol/water mix may be preferable. I like the water /detergent because it's cheaper, and I find the vapours given-off by the alcohol irritating. I'm curious, though: does the alcohol have any effect on the dyes used to colour most scenery products? And does it break-down the oil that I suggest using to keep switch points from getting glued in place?

Wayne