Thanks to all who replied, I enjoyed each and every response. Still on holiday and was up the mountain hiking and enjoying my photography when the majority of the comments were made. Here's some observations, in random order: The caps suggested/recommended was from a friend who has years of proven experience in changing them. He currently has one of the Focal JM LABS Utopia speakers, amongst many other high end "toys". The list I supplied was from the wonderful B&W Support Group's USA website that has all the service manuals on B&W,Classe and Rotel, and tons more useful information for owners of these products. I have no experience on changing caps in speakers.. and thefore asked the questions. By looking at the B&W information it could be assumed that building the separate boards would be easier, as suggested by Rodney, but I thought I would go the easier route by thinking of changing caps first. Lastly, I have a very well treated room, built largely myself, with I feel the correct amount of "sound"materials, including floors and walls. I have built my own acoustic /bass panels based on the Ethan Winer Designs and various friends, some Forum members, have liked what they heard. Now, I am thinking of trying to milk out of my aging (?) speakers an improvement(if that is possible). May the inputs continue gentlemen, thanks again.