625 bearing idler for MK3

Here's a simple idler door that replaces the standard MK3 idler with second bondtech gear with a 625 bearing. I'm not sure 100% sure it helps, but it doesn't hurt and it eliminates that 'rust' between the gears.

You'll need a 625 bearing and a 4mm round rod (I used a M4 bolt with the head cutoff).