The default keypool is set to 1000. What does it mean exactly? That I have a pool of 1000 keys/address to use?
If I reduce the -keekpool to say 20 the wallet size is drastically reduced from 1.5M  to 50k. and loads much faster?
Will I be able to add more keys later? or after I finish the 20 pool I must re-use addresses? Is there any danger in a keypol of 20?

Any will help be appreciated.