I have some miles about to expire at the end of this month and do not have quite enough for a US-Asia R/T (need 60K). I know that a "pop-up" option is available to spend $$ for the 4K miles needed to get me to 60K, nut have a few questions...

1. Once I do the pop-up, must I redeem my miles for a ticket immediately? I do not have any immediate travel plans.

2. Could I redeem for a "voucher" that is good for a year or so?

3. Are there any ways to redeem less than 60K miles for a US-Asia ticket?

Here's the stats...currently at 56K with 40K about to expire...I'm desperate for some sage advice.

Thanks!