Over the past week, I got a 7 kendama haul from Craigslist and a thrift store

I got 2 different deals, 2 kens for $10, and 5 kens for $25, and 1 kendama from a thrift store.
These are in order in which I got them, left to right:

(Deal 1, $10 for both): Sweets marble, Sweets biggie!!!
(Thrift store): Unknown brand red birch (I think it's birch), $2
(Deal 2, $25 for all 4) Possibly sweets Homegrown spectra (It said sweets spectra on the listing) with a maroon tama, Sweets blue/green/yellow Chameleon, Red Ozora, Sweets marble.
Something to note about the unknown brand ken; the bottom cup is VERY flat, and the tama/ken can spin on it freely. This makes lighthouses very hard.

If anyone knows what brand this is, or if I can fix the flat bottom cup, please tell. I did drill a very shallow hole in the cup, which fixed it a little bit.