Modern Omas Milord Piston Removal Wrench

[s_t_e_v_e]

I have a leaky barrel and sticky piston on my Omas milord and want to reseal and grease it.

Looks like the twsbi wrench is tad small for it and the other metric and imperial precision wrenches I tried don't fit. It seems like I need a 7.5mm open ended wrench but can't seem to find it anywhere online.

Does anyone know where I could find a wrench or any other tool to disassemble the piston?

Thanks in advance for the help

[dneal]

Not counting the 360, usually you unscrew the section from the body and then remove the piston and blind cap for Omas piston fillers.