Taken me 2 years to get round changing anti-sink sphere, mostly because work car & don't want to immobilise, reading on this Forum what a bitch it can be.
Rear end drops even when driving getting worse so had to sort it.
Losing my supply of Forsche Black Magic a mechanic friend recommended Super Crack Ultra (europarts)
2 weekends I've wire brushed given liberal spray of Super Crack

Today get on with it. Top class

Union removed 2 small turns then done with fingers, Sphere removed by hand
Reversal not so quick but no prob.
I highly recommend this stuff, as apparently freezes the part, shrinks so lube gets in.
06 C5 2.0L HDi Exclusive Estate 20020k and rising.
1987 Citroen CX Prestige. De Corps Brun Maya - cuir blond tabac, très chic
08 Jaguar X-Type 3.0V6 Sovereign Estate - Green (HGZ) - Leather Ivory seats.
citroencx.co.uk