I've decided not to go witha complicated block
(for now

) so I plan on making a basci spiral with 3/2" deep 1/2"wide channels( maybe a little taller and skinnier channels. Any suggestions to accieve optimum Efiectentcy with a spiral.
PS I was also thinking abou the latest MaskedGeek block,not the type-s but one he decided to make for fun. sort of like the maze 1 but with a fin in the middle of the channel over the CPU.