Help with crossover capacitors

By combining capacitors would you just solder them end on end?  Big one first?  I have a ton of soldering experience but I don't know the science very much.  And what don't you like about the Dayton stuff?  Have you done an A/B comparison?  Is that different?  I have well trained ears but I also don't need the most amazing system. I was given these speakers so I don't know how much difference it will actually make between the Dayton and something like the Clarity caps.  I'm not going to spend any more than $50 a speaker to re-cap them.

Go with the Clarity. Yes they sound better in every way compared to the Dayton caps. No contest. When combining caps to achieve the value you want you simply parallel them. Stack them with the small one on top and simply solder the leads on each end together. 

Be careful dannybad, a lot of people around here are eager to advise on things they have no actual experience with. Differences between caps are easy to hear. I'm talking electrically same value caps. Back when I didn't know this the designer of my speakers sold me a tweeter upgrade that called for a different crossover. He gave me the circuit which when built sounded nothing like what I had heard in his lab. It sounded like crap! After asking a bunch of questions and being assured I used all the correct value caps and resistors and point to point soldering he finally asked which caps? Well, Radio Shack. A week later with a Hovland MusicCap and Holco resistor and wow, magic! Bye-bye grain and etch, hello lovely liquid music!

Bear in mind this was going from Radio Shack caps sold five to a pack for a buck fifty, to Hovland MusiCap sold one for about $35. How much difference you hear will depend on what you're comparing. In any case, as long as your values are as close as you're saying then virtually all of what you hear will be due to the caps themselves and their quality and NOT have anything to do with the values being slightly different.

If your crossovers are working then I'm not even sure why you would want to replace the caps, as there's a lot easier/better places to put your money. That said, if the caps in there now are as cheap as they probably are then you should be able to easily hear improvement in smoothness and detail when upgrading to some quality caps.

I appreciate everybody's perspective on this as I'm sure there are different approaches and I will have to sort through it and figure it out myself and allocate my budget accordingly.
Millercarbon, I can definitely get with the idea that there will be a difference in Radio Shack caps and other more expensive brands.  I will look for a medium priced brand.  I am re-capping these speakers because they are 50 years old and I would like a fun project to do and when I re-capped a 35 year old mixing console (Soundworkshop 1600) I immediately heard a significant difference.  So, I'm just having some fun. 

Goodness Miller look at my feedback and the fact that I build and modify gear and cables for a living now. Been at this for years. Strange comment. Anyway, what I gave for advice is very straight forward, reasonable and smart.

Also, replacing those sand cast resistors with Mills MRA12 will also pay off nicely sonically. They cost $4 each. I would be willing to help you plan this out etc.... Done this for many A-goners.

I have upgraded so many speaker crossovers over the years that I lost count. I have vast experience with cap and resistor brands and have done the critical listening tests over and over. It is my particular passion and joy. See my virtual systems for some of my speaker and amp upgrades as well as tube amp builds 

Have fun.

Bill