Hi again Jim!
You could try the swedish FaceBook group "Släktforskning" or the internet mailing list and homesite Scangen http://www.scangen.se/, in both places it is OK to write your guestion in english.
Or have you tried to search in Disbyt? As a member of DIS you can search there, may be another DIS member has your great grandfather in his research. http://disbyt.dis.se/ . Use your members number and security code for connecting.
Hope you will find your great grand father.