I had one on a Swedish 94 Carbine - which is why I was able to afford a Swedish 94. The work did not appear to be a clumsy job, but it was not as smooth as the 98s. If I remember correctly, the bolt has to be modified with a "V" cut at the rear like on the 98s. This alters that part of the gun permanently, but you can reinstall the old parts and it still works as originally intended. There was also a trigger safety installed but I don't recall if the conversion prevents the use of the military safety or if that was just another "improvement" on the previous owner's part.
My only problem with it was that the surfaces of the cut at the back of the bolt, one side of which becomes a camming surface, is no longer hardened and begins to gall and wear and get balky after a while. I did not have long to consider whether or how to reharden the area because I reinstalled the old parts and used it that way. Also, someone offered me a bunch more money for it than I paid, in spite of the modification. All else was original and very, very clean, all matching.