I can't seem to get the correct feed rate for tapping using Gibbs with PostHaste. For example, I tell Gibbs that I am using a 3/8" tap with 24tpi and the feed rate that PostHaste gives me in the program is F25. If I change the tpi to 20 in Gibbs, PostHaste gives me F30. I have been having pretty good luck with PostHaste, but have not been able to figure this out. I would appreciate any help.