I am wondering what are a few good make/model CO2 air guns for conversion to PCP.

I am looking for something in the mid price range. Also looking for a model that has a well documented conversion process. I am "handy" and have a fully stocked shop of tools, but I prefer to have a good "walk thru" when I am learning a new skill

PAL/non PAL is not an issue is I have my PAL.

I also take a few trips to the USA each year and am open to CO2 models that I would be allowed to bring back to Canada, or even an PCP that originated in the states that I am allowed to bring back.

Thanks all.