[UM2 to UM2+ Extruder kit worth it or something else?]

Just want to know if the kit is worth it or should I do something else?

[How to get my Ultimaker 2 rear fan like the newer version?]

How to get my Ultimaker 2 rear fan like the newer version where it turns on at 40c?

Also what else is been upgraded on the Untimaker 2 v2?

Thank You for the help in advance :-D

[UM2 in Boston, MA]

Sold to me