I’m topping up CPF MA to current BHS of 63k so that the monthly contribution will flow from MA to SA helping to accelerate FRS and close to ERS by 55.

This would be the annual strategy until 2025 end at the very least – voluntary top up of MA to BHS and SA top up of 7k.
This the estimated CPF balance projection by end 2023. One endowment approx 26k will mature on November this year and will pump it in to SA.
The plus point of voluntary top up is that it is tax deductible (Max 7k for self)
CPF is the last line of defense for retirement other than own investment portfolio.