I have textured PEI from Prusa, QIDI, Energetic, non-brands, and private labeled ones from the biggest DIY printer and parts resellers in the US. I also have smooth PEI (amber, and black) from a wide variety of those sources as well. Most are okay. Some less so, some a bit better. I also have Whambam's CF and PEX plates.

Hands down, this is my absolute go-to build plate. It's vastly undermarketed vs the CF and PEX plates. The CF plate has a place for things that are super sticky and tend to overbond, like PPS-CF and HTPET. However, those require bed glue for nearly everything else, and the surfaces are not as durable as this Ultem textured PEI.

I use it for everything, including PLA, PETG, TPU, PET, PC, ABS, ASA, PPA, and PPS. Great bonding and lets go when cold.

Tip: If you have a stone countertop, remove the build plate and rest it on the countertop. It will suck the heat out quickly, and you will quickly hear the crackling / popping sound as the parts release.

Cool Gadget

Wham Bam flexi plates are required for consistent resin printing. If you have a resin printer. Buy one today

It's a MUST HAVE !
Makes cleaning out the nozzle much easier.

I got one of these back when the Bambulab x1c came out and love this for PLA. Apparently I never read the instructions about scuffing it though because the one for my H2D said to scuff before use. Anything I did on my old one with PLA unscuffed stuck with no problem. The scuffed H2D plate things stick even harder where my other one they would come off on their own when it cooled down. I'm super happy with the plate and would buy again. I haven't tried anything but PLA so I can't comment on using it for other filaments.

I love this tool, makes VAT cleaning so simple and the handle hooks perfectly for minimizing resin loss.

HREAT tool! It’s not only well-made, but it works better than I expected. Highly recommend to get for your resin printing experience!

This thing is great! Makes cleaning out your resin vat a breeze!

I ran some clear red ABS like resin on my Saturn 4 Ultra for a job I was working on. Well with 25 seconds for the initial layer, I had to chisel the parts off the build plate. I did a little research and came across Wham Bam. I was a bit skeptical, read some experiences were there was no adhesion, metal plate moved, magnet detached on the first try...and so on, but the more I read the more I saw that it was user error. Took a chance and ordered the Wham Bam XTR Flexible Built system. Package arrived quickly. I made sure to follow all instructions, which were very straight forward. I did let the magnet plate adhere to the build plate for well over the required 72 hrs while I waited on some resin to arrive. Followed all directions and got to printing. As soon as I flexed the metal build plate...the parts just slide right off. This thing is amazing. Remove plate, flex, parts come right off, wipe, and back to printing. No more using metal scrapers, razor blades, chisels and hammer...I love this system. Going to order another XTR kit for the extra build plate once it arrives. My only issue is that I wish there a couple of pieces of sand paper that are the same or a bit larger than the build plate included with the system, Either way...HIGHLY RECOMMEND!!!

The tool works awesome on my Saturn 3 ultra. Works every time.

Fantastic plate !

Ran into an issue with my Elegoo Saturn 4 Ultra since it detected a foreign object after install. Found a firmware update that fixed the issue and now I am able to print directly onto the printed and have absolutely no issues removing the parts. Thanks Wham Bam!..

I purchased for my QIDI I-box and another one for my S-box,since the day I purchased these qidi large format printers there has never ben a happy setting with sticking and removal either parts would not stick period or I would have to use a hammer and razor blade to remove parts,I have a permanent bloody hole on the side of my thumb every time I removed a part it would hit the plate causing bleeding injury,I despised and was terrified of using these printers because of this issue,now I can set the bottom layers high enough to stick and be able to remove the parts with no tools and no more bleeding,I have ben looking at these plates for quite some years and now wish I would have purchased these when I first saw them,I now have them on all my resin printers they are a absolute necessary accessory,and also the other accessory they sell like the rubber spatula and vat weight and splash mats,I purchased are a absolute dream to use

Heavenly ! Just what I needed !!!

Having this I enjoy doing a lot more 3D prints without all the messy glue clean up. Plus I really like the texture of the print from the plate