Keep my 3.861 and 3.812 and forget 3.864
Upgrade 3.861 to 3.864 and leave the 3.812 alone
Upgrade 3.812 to 3.864 and leave the 3.861 alone
Buy a 3.864 and ebay my 3.861
Buy a 3.864 and ebay my 3.812
Buy a 3.864 and compare it to 3.812 and 3.861
