These Caps become more problematic as C 24 & C25 age and loss Capacity.
You are on the right track with the Tant's. Just make sure you do the Electro Mains as well.

The Audio Coupling Caps (47Uf) are also worth changing. This Sound Board is the Most difficult and labor intensive of them all.

The 47 UF caps are 25 Volts sitting in 12 volt circuits so they haven't caused any problems yet but they will eventually.

C26 C28 C47 C46 sit on the 25VDC unregulated supply lines...The other Tants are hanging off the 12 VDC regulated Supplies.
So just change those 4 Caps..The other Tants will last forever

Tantalum Caps will only fail if they are operating close to their Voltage rating. Every time I replace caps I up the Voltage rating if the Board Space is available.
Install 50 volts Tantalum Caps. If you use a higher voltage rating Electrolytic they will last longer. I use 15,000 UF 50 volt caps on the Driver board. They are big but they fit with ease