This ultralight counterweight shaft fits Takahashi mounts P2Z, EM-1, EM-2, EM-10 and EM-11. And possibly some other older mounts. This shaft is manufactured by my friend on a lathe from a lightweight diameter 18mm aluminum tube. Together with my TraveLight (TM) portable counterweight system, it saves over 2 kg of luggage weight. May not seem too much, but let's try to fit a complete CCD imaging system for a vacation trip to very remote, exotic dark location, with airline checked-in luggage weight limit of 20kg...
Technically it will support up to 6-7kg of counterweight but becomes slightly shaky under approx 4kg, so may not be recommended for someone wishing to balance imaging setup at the threshold of EM-11 capacity. On the other hand, it fits very nicely with P2Z and lightweight DSLR imaging setup with 200mm lens or FS60.