Details:
I wanted to do an Imperial thread on my Viceroy recently but I found it was impossible, I've cut imperial threads before using the Spreadsheet on the Denford site for guidance. With the gears that I have I couldn't get within 10% of the thread I wanted.
What I would like to get is a combination gear or possibly a 38T stud gear. If you can help at all I would like to hear from you.