Changing out Spades

That sounds like a very expensive experiment. My vote would be to trade them in or have them reterminated to a proper sized spade. ♠️. 

here was what AI said when I pasted your question to it.
Replacing the factory spades on your Clarus Crimson bi-wire speaker cables is a practical solution for fitting the narrow barrier strips on your Vandersteen Quatro speakers. However, because these are high-performance cables with complex internal geometries, there are several technical concerns to keep in mind.

Technical Concerns for Re-termination

• Complex Internal Geometry: Clarus Crimson cables are not standard "twisted pair" wires. They use a multi-gauge designfeaturing three different conductor shapes (round, flat, and spiral ribbon), each individually insulated to optimize specific frequency ranges.
  • The Risk: When you cut the cable and "peel back the casing," you must be extremely careful not to nick the individual insulation on these different conductors. Damage to the internal dielectric can lead to signal degradation or physical shorts.
• Termination Method: The AudioQuest 507 Series Multi-Spades use a 4-bolt cold-welded (screw-tightened) connection rather than solder.
  • The Concern: Because the Clarusconductors vary in shape (including thin ribbons and heavy-gauge round wires), ensuring a secure, uniform mechanical contact with the AudioQuest set screws can be difficult. You must ensure all strands—especially the delicate ribbons—are properly captured and compressed by the screws to avoid "strays" that could cause shorts.
• Material Mismatch: Factory Clarus terminations use military-grade beryllium copper with a specific "Spring Tension" design for low-loss connection. By switching to AudioQuest's Pure Purple Copper, you are changing the metallurgy of the connection. While both are high-quality, the sonic signature of the cable may shift slightly. 

  www.claruscable.com +10

Best Practices for Your Project

1. Use Proper Tools: Ensure you use the combination Allen/Phillips tool included with the AudioQuest 507 Series to torque the set screws properly without stripping them.
2. Maintain Polarity: Since these are bi-wire cables, you have four conductors at the speaker end (High and Low frequency pairs). Triple-check that you are correctly identifying the positive (+) and negative (-) leads for both the bass and treble sections.
3. Barrier Strip Clearance: The 7/16" width limit on the Vandersteen barrier strip is strict. The AudioQuest 507 Multi-Spades are specifically designed to fit these standard 3/16" and 1/4" barrier strips.
4. Consider Professional Re-termination: Given the price range of these cables (typically $4,550 to $9,600+), any mistake during stripping or mounting could significantly impact their resale value or performance. If you are not comfortable managing the different conductor shapes, consider sending them to a specialized audio shop. 

   Vandersteen Audio +5

Do you have the specific wire stripping toolsneeded to handle the delicate internal insulation of the Clarus conductors without damaging the different wire shapes?

Thank you, gkelly for all the information. Wow, I'm now nervous about this and it's why I posted the question. 

Clarus said they wouldn't re-terminate them for me. With the complexities you mentioned above, I do not feel qualified to do the switch.

Who can do this for me?

That is ridiculous that the company who makes a four figure speaker cable won’t re-terminate for you. I have found that this company will give you a halfway decent trade-in value on your product. 
https://www.thecableco.com/

ask for Ethan

Another option is call the company and ask if it is viable to have you do the switch understanding that you were going to void the warranty. My biggest concern is, are you changing the metals on the spades? With the cost of those speaker cables, I would believe that the company would have taken that into consideration