Enclosure Fan config for MCU + Raspberry

Hi I wanted to cool the raspberry when the printer is idle because the temp goes to 50deg+
The enclosure fans are 2x24v 4020 Sunon (2pin parallel) and the board is a SKR Pico
I came up now with this solution:

[duplicate_pin_override]
pins: gpio20

[controller_fan Controlling_Fan]
pin: gpio20
heater: heater_bed
idle_timeout: 300

[temperature_fan Enclosure]
pin: gpio20
sensor_type: temperature_host
control: watermark
min_temp: -40
max_temp: 85
min_speed: 1
max_speed: 1
target_temp: 45

Unforunately I could not use mcu temp for a temperature_fan > this led to a ADC Error so I used the heatbed as controller host

At the moment it works as intended (had some worries with duplicating the gpio but with watermark-only fans it should be ok)