I’ve flown Cessna Cardinal’s and the new 172 SP (that sucker has five, 5,!!! tank sumps per wing) - all fuel injected ....
Subaru engines are coveted by a lot of experimental guys ... great engine .....
Do you have to manually switch tanks? Tell me that they have an automated system.
I have 5 sumps too : ( One for each wing tank, two under the fuselage (it could have been one) and one at the engine. I typically just check the two under the fuselage and engine sump because the engine sump can catch a cup of water or so.