The ordinary felt clunk will empty the tank to the last drop AND have ample flow AND prevent bubbles as long as fuel keeps the felt wet.

Sintered clunks:
The $1.99 type works well in RCcombat planes. It is about the smallest available, and also is used in air cylinder silencers.
the plastic sintered type like in Ryobi engines and the $7.29 type , gave me too high fuel flow resistance values after a while, so I will not use these again