Hi all just a quick one. Has anybody got any idea what the thread is on simplex regulator, it says its left hand but there are no other dimensions on the plans, Which i have come to expect now! If i have the thread size I think I could work the rest out but if anyone has a full drawing or know where I can get some from i would be grateful, yours keith. MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.