At 05:48 PM 11/17/05 -0000, you wrote: >I have just acquired, at great expense, a piece of steel tube 8" I.D. Barrie, A 1 thou' shrink doesn't seem to be enough to me. I'd think something on the order of .004"-.006" would be about right. The only such shrink I've done was on a set of 2.75"od wheels and IIRC I gave them around .002"= =B1 and they haven't budged. Regards, Harry 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.