Anyone have experience with Soundsmith’s strain gauge?

After watching Peter Ledermann’s excellent presentation on phono cartridge design I am now quite interested in his Strain gauge cartridge. Unfortunately reviews for the product seem to be sparse and are from nearly a decade ago. I’m wondering if anyone here is an owner of such a system and if they’d be so kind as to share their experience with it. I currently have the Aida cartridge from their high output MI lineup and I want to know if the sound really is a big step up from what I currently have. 
And don't forget the reduced costs of l/t ownership.
So, buy a Top Wing Red Sparrow cart for $15k.
Retips every 2-3 yrs c. $10-12k
SG? $9k minus trade in for phono (that can be spent on LPS).
Retips c $1k each.
The numbers don't lie Lol.
Does Ledermann still have them 25% off?
Not SG, I believe. Never did. Unless I'm  v much mistaken.
Coulda sworn with the shutdown thing he put everything 25% off.
This is from another thread here, submitted by Mr. Lederman himself...

"We are building to order, so there will be delays, but the above comment is correct ~ it is a great moment to buy a Soundsmith design. Our 6 top designs are discounted 25%; LOW OUTPUT - Hyperion, Sussurro, Paua, Zephyr MIMC Star, HIGH OUTPUT The Voice, and Aida."