thanks for that i have one manual for the machine but it went over my head but i have managed to calibrate the machine and all is well, i was struggling with getting the correct filter values for grades of paper but then realised that if you dont turn the filters to off and zero the machine when you switch machine back on it thinks its at 0 in all filters when actually its not so now i can dial in the correct filters for each one everytime. now i have nearly got everything to start developing film and paper, my darkroom is nearly finished so will let you know how i get on