Universal HicWic vs original tool mount for aluminum milling

In the last days I was testing aluminum milling. My build has Hicwic universal tool mount.
With DOC greater than 0.3 mm, I can see a lot of rotary tool deflection in the tool mount…
Does the original tool mount plate should be more rigid than Hicwic’s universal mount?

Yes

Great. I’ll try your original design. Thanks.