The Phantom is a polymer framed SP01 9mm with light weight, a full sized mag well, and a suberb grip shape and texture. It stays anchored in your hand like Velcro.
I have a Kadet kit that I already use on my P01 (compact) 9mm.
Kadet kit tuning on the Phantom took some time. First of all, it slides right on, but the non-reciprocating part of the Kadet kit is really only supported at the slide stop block area and not at the forward part (the polymer Phantom dust cover does not really offer slide support, the Phantom slide is supported by mid and rear metal inserts in the polymer frame). Despite that, it functions well and shoots accurately as a 22LR. For slide lock back, one will need to modify a PCR slide stop. The Phantom slide stop's inner lug is way too short to reach the 22 mag follower. A PCR slide stop inner lug is long enough, but it still needs modification. The PCR slide stop has too much resistance for the weak 22LR magazine spring. The options are to remove and bend the slide stop spring (which helps some, but too much can make the slide stop spring too weak for normal 9mm function). I ended up filing the slot on the PCR slide stop shaft (the notch on the top right of the shaft that abuts the slide stop retaining spring). The deeper this slot, the less pressure the slide stop spring exerts. Deepening the slot could potentially weaken the slide stop, so only use the PCR slide stop for 22LR (and not for 9mm). I tried my best to balance everything to allow reliable lock back on the last round and retain slide release with sling shot pulling of the slide. However, due to the extra friction of the polymer (despite deburring the polymer portion of the slide stop holes and polymer frame face under the slide stop), this was not possible. I settled by filing the slot so much that there is no significant downward pressure on a lifted slide stop, so I release the slide by simply pushing down on the slide stop after reloading (as one normally would). It will not release on its own using sling shot pull back. However, it will lock back the slide after the last round, reliably every time. That was more important to me as it prevents damage to the firing pin (dry firing some rim fire guns can be bad for the firing pins). Despite the lack of downward slide stop pressure, it did not lock back prematurely with rounds left in the mag, test fired with 200rds. Using the stock Phantom slide stop with the 9mm Phantom slide is still completely normal.
I found my Kadet kit mag followers to be very gritty after about 1,000 rds each. I disassembled the mags and used a test tube brush to clean the inside of the mags and followers really well. While I was at it, I restretched the mag springs 1" for firmer spring action.
The reason I did all this work to get the Kadet kit working on the Phantom was that it is so much cheaper to shoot hundreds of rounds, and excellent full-sized-handgun practice. The Kadet kit mags are full length and stick out too much on my more compact P01 (function fine but look weird). The Kadet kit mags fit the Phantom perfectly. Also, my Phantom's single action trigger was very stagey and creepy. I performed an "in situ" sear hone that helped alot, but was still not quite where I wanted it. The extra range time afforded by the Kadet kit has helped the sear break in process and better trained my finger to the Phantom's trigger action. It shoots very accurately if I take my time. Rapid fire is fun but not as accurate, of course. The Kadet kit is not a match system as it is hampered by the CZ75 trigger system. My most accurate 22LR pistols are Kimber and Ciener 22LR conversions on match tuned 1911 Colt Commander stainless steel frames (mainly due to the crisp, light, short-travel triggers). The Kimber 22LR conversion is a real tack driver. The Ciener is not as tight fitting but is a sweet and handy Commander length.
