A while back, I built an indexing head from aluminum and steel. While not an extremely heavy duty device (which it was not intended to be) it works well. BUT, I have decided to build a dividing/indexing head from steel as a more advanced and heavier duty unit. I would like to use a worm wheel and gear,but the price is just too high to buy them. I have seen some units made using a straight tooth gear such as a change gear in place of the worm wheel. I like this idea for cost and flexibility reasons but how do you make a worm to run the straight tooth gear. Does anyone have any insight into this?