20 days is the minimum age,
Here is what you can do to keep your stake,
In coin control , every few days or weekly, look at the blocks , click on confirmations, this will sort the blocks, select some of the ones with the lowest confirmations, and send them to your default receive address (You will have to copy & paste your default receive address into send field, no way to add it your send address book Yet.) By selecting the lowest confirmations you only combine coins that have staked recently and they won't lose more than a few days from their maturity. (1 Last tip , Keep your transfers of Zeit below 10 million at a time , you can go higher, but the transfers take longer in my experience.)
 

P.S.
You don't have to drop it down to 75 blocks, since you are at 8000 , drop it a little at a time and keep your stake, you will probably notice some improvement of CPU usage every time you drop a 1000.
After the Research Data , Zeit wallet Load Time will be between 3 & 5 minutes for most users with our current wallet version. It has been added to our goal list for the Zeit Counsel. If that is too long a wait add Zeitcoin to your startup folder and set it's properties to minimize. That way it will be there immediately when you want it.