Need to understand.... My Sep 91 copy of 275 states on pg 64 in Table 5-11 that the internal minimum annular ring (MAR) for Class 1, 2 and 3 (have absolutely no idea what Class 3 Military means) shall be .001. My fabricator points out that the Mar 92 copy of 276 states on pg 9 para 3.7.2 that the internal MAR for Class 3 shall be .001, fine, but that the MAR for Class 2 allow 25% or 90 degree breakout. Which boat did I miss this time????? Also, if someone could explain the REJECT of Concept A, in Fig 1 Coupon F on pg 9 of 276, I would be very grateful. Thanks in advance. Regards, Bob Vanech *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * ***************************************************************************