Can anybody tell me if JBL used the same sized pegs on their cabinets and the same sized rubber grommets on grill frames on all their "L series "speakers in the late 70's? Will L56 pegs and grommets fit into my L100 cabinets and grill frames? Is adhesive used in the installation or are they just tapped in the existing holes on the cabinets and speaker frames?Thanks for your help.TA