There is a fix for the 4.8 plus 8. Mine was virtually impossible to fill in less than around 10-15 minutes, now perfect.
It was done FOC as it’s possibly a safety issue. Two hours work so not widely publicised .


1969 4/4
1995 plus 8
1996 Plus 4 4seater
2002 Aero S1
2013 M3W
2014 Plus 8