Fixing the hot and the cold sides of a PELTIER element with springs and 40x40mm ALU-profiles. Flexible seal is used to tighten the gap between the hot and the cold sides.
40x40mm fan is proposed to blow on the cold side. 80mm or 120mm fans are prepared to cool down the peltier element hot side.
The fan adapters are included.
The springs are about 20-25 mm long, 10mm outside, 8mm inside diameter
For the seal between the tubes and the ventilators use: https://www.thingiverse.com/thing:3879982
For the seal between a wall and the tube use: https://www.thingiverse.com/thing:3883088

DIY Flyingbear

Doesn't Matter

Yes

0.2

90%

The is also a flexible filament used.

The best way is to use the Cura to generate the support.
One setting is included.

The aim was to use a maximal 60W Peltier element cooling.
With a thermal paste on both Al2O3 substrates the element is pressed by springs on both sides.
Openings for the peltier wires are included in the flexible seal.
The springs will balance the peltier element inside the seal.