Other European Frequent Flyer Programs - CSA TLV-PRG PRG-AMS and what to do with 20,000 miles?

hello,

i had 120,000 miles in my OK+ account. booked 2 business class tickets to Amsterdam

does any one know:

1. what to do with the remaining 20,000 miles?
2. does CSA usa A320 or A321 on the TLV-PRG route?
3.CSA use A319 for PRG-AMS, is that with the new business class? (nicer seats)
4. does KLM open more award seats closer to their flights TLV-AMS? ( i rather fly direct...and now im only flying direct on the return flight)

Thanks for the help!