I have one.
Just call Scott for specs and loadshttps://scottfrankland.com/
I am using his first generation Wavestream Kinetics Phono Tube. Scott still makes all his gear, and he is wrapping up the generation 3 board for the phono tube. His gear is upgradable. I skipped gen 2 but when I visited and spoke with him last month (his shop is relatively close to my house), he said he will have the gen 3 phone tube board out shortly.
Re. MM/MC...you can insert resistor packs to adjust the load.
I am using a Shelter 901 mk3 cartridge, low output moving coil.
Search my name on this site; I recently experimented and wrote my response to a person asking about tube rush.
I used to use a Audio Research SP14 preamp (hybrid) which had a 12AX7 tube for the phono section. Apples and oranges comparison; Wavestream in another orbit. I already have MFA gear and a Wavestream Kinetics tube line amp...so it was pretty much inevitable I would go the distance with the phono tube addition.
I am done upgrading to new models (except for board upgrades!)
Note: Scott used to build a very high end RIAA tunable phono tube preamp....I don't have that one...that was not something I was interested in...he may still be building that as a one off. There are zero front knobs on my unit.