OK, so just a fun quite cheap Multi project and that could be updated with lighter components and different props.
I'm using less than 2 bucks 1104 4300 kv motors from Aliexpress. Destroyed 2 in the process of making this thing (I don't recommend those motors since they use very tiny diameter for screws and special holes distance). It's obviously a LOS multi only ;)

• Inside the canopy are crammed a CC3D and 6 x 10 A or 20 A Escs that I had from old dusty quads. Won't show the mess and hotglue, lol
• 162 gr AUW with a 450mah
• Frame is coming from a toy I bought second hand on Ebay like site. Arms are in aluminium. Centerpiece is plastic so won't hold a serious crash
• Motor supports are 3d printed (my conception)
• Flies less than 2 minutes with a 450mah battery (bad yield of those small props and I think 4 inch triblades would be far better).
• but... It's completely silent !
• I don't have videos of it yet but had pleasure to make it fly around. It's not a racer but it's already at least twice as performant as a the toy it was
• Edit : I tested briefly 3040 triblades props and they seem to be better for punch