[Steve Davis]

The 70/90 front panels have a 1 inch diameter counter bore for the speaker nuts. When making a reproduction cabinet, I make 7/8 inch counter bores for the new style nuts. When making a replacement front, I always ask the customer if they have their original speed nuts, so I know what size to counter bore. One thing I have done in the past, I have used a small dab of JB Quick (the fast setting JB Weld) to hold the nuts in place until the speaker has been mounted.

Steve