Steyr Need Tool Remove Air Cylinder Base- borrow or buy

Hello AGs

I need to use a Steyr lg110 (most 10m guns) tool to loosen the base cap.
It has 3 holes for a tool with 3 prongs to fit into to unscrew the air cylinder base, the part that screws into the gun.
I will borrow (I will pay shipping of course)or buy.
Thank you Charlie

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Here is how someone did it hope this helps