You do have to take off the passives AND the lower bass woofer to do it.
Once you glue in the caps, it is very easy to solder them in place.
I only have one done, as there is conflicting info on the second set of caps and I'm not sure which way is "positive" on them.
I'm awaiting word from BC.
The base and passives were very easy to take off this time, because I had broken the seal on them a week ago.
I have the black oak color and it is regular oak that they paint. The basses were literally painted on...