fan funnel reduction 25 to 50 mm for rebel2.stl

I didn't want to buy small fan (25mm), because I head plenty of the bigger ones (50mm) when I needed a fan for my coldend (cooler) cooling. I had a 25mm fan cooler mount piece (blue on the photo) which came with the printer parts so I've done a reduction.
Originaly it is planned for a czech printer REBEL2, but you can use it with anyithing that works.

You will need
- M3 - 10mm bolts for the 50mm fan
- M2 - 5mm bolts for the reduction to cooler mount

As I didn't designed it with axi