I made a plate for more blades. The Beos one on Amazon costs 35€……
I printed it in PLA-CF, you'll need support only in the middle.
I used the Ruthex M4 threaded inserts and the original screws. Here the link….https://www.amazon.de/dp/B08K1BVGN9?psc=1&ref=ppx_yo2ov_dt_b_product_details
The weight of my plate with 8 Blades, is exact the same of the original plate with 3 blades, so you don't have to worry about the E-Motor of the Mower.
Everything works fine.
Let me know if you like it!