GEEETech i3 Heat Bed MK2 air fan block

PROBLEM: the hot bed is cooling in some zones because some fans put cool air flow under the hot bed. this provoque the buil thing lost stick to the plataform.

to solve this build this to prevent cooling the heat bed mk2 by any fan near the hot bed,

this piece is very long, probably yo need to do in 45° at regular 20.0x20.0cm bed