Flexible PEI Print Bed

I was losing enough space to the Aero that I didn't want to lose more space because the cooling fan duct could hit the swiss clips I was using to hold down the glass print bed, so I got kit to install a flexible PEI coated print bed held down with a magnetic sheet stuck to the aluminum bed.

My very first print (of a calibration piece) came out pretty much perfect:

Wiped the surface down with isopropyl alcohol before printing and after letting it print and cool a bit, I pulled off the flexible bed and bent it just the tiniest amount, and could see the piece separate with no trouble.

So at least with PLA (and a print bed temperature of 70) it works great. I see lots of advice on the internet that TPU sticks too hard to PEI and I should use glue stick on top of the PEI, so when I finally try TPU, I'll do that.

Some additional images of the new print bed showing more detail can be found here.

It was pretty trivial to install. Getting a corner started pulling the backing off the magnetic sheet was the biggest challenge :-). It is a couple of mm smaller than the aluminum plate, but since I can't reach the whole bed anyway, that doesn't matter. I made sure the right side is against the right side of the aluminum (which I can reach).

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