The US McKinley doesn’t have a VFO (pretty sure that’s true for the EU version as well). It also doesn’t appear to have a 5 kHz shift feature, which the Grant II does have.
With that, I don’t think the McKinley EU would have a lot of use on amateur bands, or even on the frequencies beyond 40 channel CB. You can use it, but only in 10 kHz steps. That can get frustrating at times.
There is a clarifier mod shown on Mike’s Radio Repair YT channel, but it does involve very tiny surface mount components. Perhaps the modified clarifier can cover 5+ kHz on transmit ? If so, then it becomes more useful, but you are putting more work into making the radio meet your needs, when there are radios our there that do all this for less money (and often, with more TX output power).
The McKinley SWR adjustment feature is interesting, but when I compared the results to my antenna analyzer, I found the McK indicated SWR readings different from my analyzer, and went with my analyzer. It is handy however for getting you in the ballpark, without a lot of back and forth to take a measurement. And at 4 watts/12 watts output, not a big deal.
I would buy an EU version if it were closer to $200 US, but at nearly $350 US, it doesn’t give me anything my President Lincoln II+ doesn’t have, and the Lincoln is $100+ less. Also doesn’t offer me anything over my Grant II. And since my U.S. McKinley was given to me for free by an old friend who preferred his Realistic CB over the McK, I am quite happy with the radio as it is. It sits in my old ‘93 Blazer K1500. But I resisted buying a McKinley since they were introduced, because the initial price was $199, and now they are around $179. A Uniden 980SSB is at least $50 less and not much different from the McKinley. A Lincoln II or AT-6666 are around $250.
I think some of the newer President radios are likely loaded with different firmware for the US and EU markets, so even if there was a modification for the EU model, it likely wouldn’t work on the US model. I found the “hidden menu” on the President Bill FCC radio, but I think there is another step needed to allow me to change the values of the AMC and TX power (AL and PL). Even so, I don’t believe there are any additional channels in the US firmware version. This is likely the case with the US McKinley. And also, I really don’t operate outside of the 40 US channels anymore, so I would only be interested in using the McK EU on the amateur bands, and again, it lacks some needed features that a Lincoln II or AT-6666 have, for much less coin.
YetiComNZ also has the McKinley EU listed for sale. When I ordered from them 2 years ago, it cost about $60 in shipping to get my order to the US east coast. That would put the McKinley EU about $345 shipped from NZ...assuming shipping is about the same.