The redo is actually pretty easy. Do need a hotglue gun or other adhesive, soldering iron, clippers, solder. Also, when you get the caps, get some shrinktubing or tube insulation.
Depending on config, and what you find easy. locate a spont on the x-over to mount the cap. think about polarity and existing wire length when you do this. The exising can can be left in place and used as a mounting point or removed and the new cap mounted on the board. I left the original in place and mounted mine on the bracket. If for some reason when I am gone Jr. sells them and the new owner wants to restore them to orinal, he can open the can and rebuilt. This should what 120,000x the value 50 years from now. If NPO, then simply connect the existing wiring and if polarized do the same but maintain the polarity. Oh, make sure you first put on the tubing or make sure you have the wiring located in such a position it will not touch anything. Also, clean the leads coming from the new cap. Mine really filthy.
At first the system will sound like SH*T. Do not despare. Simply through on the FM and let it run. Need not do it at high volume, simply trying to get the cap to form. The time depends on the cap. Mine took about 50 hours to get to a point where I knew what I had. I have about 300 hours on the system now and last night listening it mid to tweeter transition is completely seamless now, better than any speaker I own.
The guys here can give suggestions as to what caps to use. I simply went down to the local parts shops and picked up poly pros that were about $2.00 ea. MFD was the same whle the voltage was higher by 10 volts if I remember. Now that I know what the speakers can really so and they are keepers, I plan to research a better cap and do a sub. The caps in your W60s are 12mfd? Writing this took about the time to do the actualy cap changeover once the x-over is accessable, the glue set and the soldering iron is warmed up.