Just a quick review of these: Ordered from CdV on July 13th (evening) and received at my door on July 21st, so 8 calendar days form the UK to Tampa (including processing and customs) is pretty good. I ordered 2 (sets), one in red and one in purple (lavender) to match my Radius' finishes. The
threading on both the standard size (short) and longer tips is perfect and the outer diameter is flush with the diameter of the SVM base. The flush fit and smooth edges give these tips a very comfortable mouth feel, much like the original tips that ship with the K5.
I know these are a novelty and there are less expensive options out there, but if you're a person that likes to modify your setup with sharp looking accessories, these might be worth looking into.