I've been on a quest to improve the flatness of my 3d printer bed to improve my 3d printing. I learned the hard way several things:
1. How not to do it and get a terrible variance
2. How to remove an adhesive on magnet from the base safely
3. A key way to greatly improve the flatness and variance of your bed

I test a fantastic, locally produced, 3d printer cast aluminum bed plate from Precise Printer Parts (I highly recommend it): https://preciseprinterparts.com/Print...

I also test a great PEI printer bed plate from Fulament called Fulabed 2 (I highly recommend it): https://fulament.com/

If you wish to purchase the plastic scraper, it can be purchased at Amazon where I receive a commission that is applied to content creation for this site: https://amzn.to/3ndNv8M
The military green ABS and black ASA filament: https://www.paramount3d.com/?ref=o45...

The video follows the 3 bullets above. Please don't do what the video initially presents, it's not the correct way. But you should get some good tips to improve your 3d printing.

I review the Precise Printer bed and the Fulament build plate. Please note that I personally paid for everything in this video.