Am looking to start a DONE5 trip next Jan which will extend for several months. After the first 4 segments ending March 31st 2026 then the rest of the itinerary is fairly flexible.

In reading the rules it seems cost for a change (transaction) is $125 USD so it seems there is no way to avoid paying this as not possible to book more than 12 months in advance (or is there a way of putting dates in the booking more than 12 months subject to availability).

If not then I will wait until the end of March to ensure I get the flights required for activities planned and then I can do a bulk transaction, maybe in Sept, for the rest of the Itin and pay the $125 USD once