Thank you very much for yours help, now it is a bit more clear to me how disassemble the L1300.
A special thank to ic-racer and for his wonderful work on his L1840 and the very well documented thread on largeformatphotography forum. The coloumn of L1300 seems the same of the L1840 and I'm thinking to transport the enlarger with my car (a 7 seats suv) with the help of a friend, hoping that two person can transport the disassembled L1300. The coloumn seems to be the heaviest part, but I can't imagine how much it weight (there is the motor inside I suppose). Please ic-racer, on the base of your experience with L1840, can you tell me if four arms are enough?
Thank you again