I have welting that is by itself ( no weatherstrip attached to it ) and Kia weatherstrip. I also have the Precision welting with weatherstrip attached. Which would you use ? The Precision seems to be soft. Here's a couple pics of the Precision. Thank you.

You've got two weatherstrip products with attached welting - why not try each of them to see if one works better than the other.  I tried PRP several years ago and encountered the "fat seal" problem, switched out to Kia and happy with the results.