I promised to help a friend with servicing his RS Deluxe shock and I have some difficulty removing the white nylon compression ball from the bleed port. RS recommend pushing from the oil side with a 1,5mm Allen key which didn't worked at all... It's the first time the shock is open and the ball seems to be heavily compressed. I even removed the IFP, install the seal head / air piston into the damper body and then pressurised it as high as 450psi. Nothing moved and the it was airtight. In suggestions?