Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

I'm with Len on this one: quality taps, back out a lot. Turn slow, too. I don't use tapping attachments, because they're just not sensitive enough for me.

Oddly enough, over the years I've found a lot of good taps at yard sales, often unused in little boxed sets of three....

I'd also like to know what a "large nunumber is.