A couple of questions...I assume that the gear turns as the tap pulls it into it. The examples I've seen have all been aluminum. Would this work with steel gears as well? I'm thinking there is a lot more pressure involved and was wondering if a more elaborate bearing setup would be needed for the gear to turn on. Also..the setups I've seen seem rather light...when doing this with steel gears would you need a much stiffer setup overall? I'd like to try this. Thanks.