hi JBBJ
I did the upgrade a while ago, if you are not using a Pi2 or Pi3 you may find the need to upgrade as I did, mentioned here The new dongle worked very well, no other changes to antenna or cables, other than the SMA connector at the dongle end. I then found I had MLAT timing issues which changing the Pi2 for a Pi3 resolved. Not investigated the cause, more important things in life!
Roger