the columbia web site says that the tors shell and the castle mountain shell have the 5 point interchangeable system. under the tech specs on your site, it says it is not interchangeable. are they interchangeable or not? i have a titanium fleece and i am wanting to buy a shell for it.

Tech Specs:

Material:

[Shell] Omni-Stop stretch softshell; [Lining] polyester 

Waterproof Rating:

Water resistant 

Breathable Rating:

Not specified 

Core Venting:

Pocket vents 

Pockets:

2 Front, 1 chest, 1 internal 

Seam Taped:

No 

Powder Skirt:

No 

Hood:

No 

Zip-in Compatibility:

No 

Recommended Use:

Hiking, backpacking, climbing, skiing 

Manufacturer Warranty:

Lifetime 

Country of Origin:

China