Wayne Parham Messages: 18723 Registered: January 2001
Illuminati (33rd Degree)
About mounting, you're right, the SB-29 mod requires some alteration to fit physically. Not so much if the tweeters are surface mounted but even then, the mounting holes are different.
As to the differences between the RDC and RDNC, I haven't even tried the RDBC. It's quite different actually, both physically and electro-mechanically. We're only talking about the RDC version of the SB-29 here.