I bought a set of rollers at a 2nd hand sports equipment store. I have found them very difficult to use. In addition to trying to stay upright on them, I find they give my tires a lot of rolling resistance and ten minutes on rollers is quite a strenuous workout. I have a welder and have considered making a bolt-on jig to support the fork in place of the front wheel. That would get around the balancing problem. I understand your need to stay indoors, but I have decided I would rather wear whatever is needed to stay warm in the winter and hit the open road. I have given some serious thought to selling my rollers.