What capacitor values?

This depends on a lot of factors and is complicated. You shouldn't guess at this. Search the web for crossovers. You'll see you need the specifications for the drivers to put into a formula for high and low pass.
I would roll the woofer out at some point. I don't think it's a good idea to run a 12" woofer without taking it out. A woofer this big doesn't do mids very well and could operate out of its passband.
Go to the Scanspeak sight for more information.
BTW, you are using a simple 6db crossover. Of course this doesn't mean the speakers would be phase correct or time aligned. Good luck.

You might need an inductor on the woofer. What are the other cap values and why do you feel they are not the right value?

I've had the speakers for 30 years and their sound is extraordinary (due in no small measure to the lack of complex crossovers and the full-range woofer).
The existing capacitor values are impossible to see as they are glue-gunned to the cabinet beside the drivers and I'm not a soldering person.
I need to order the new Dueland VSF caps which will take 2 weeks to get to me and then I will have a technician take the speaker apart and solder in the new caps.
I wanted to know what others thought about the best values for the new caps but if its difficult, I'll have to just the repeat the existing capacitor values.