lol bro you worry too much.
You're building new set up, why will sump leak? If you follow tt train of thought, then main tank also can leak, then might as well don't keep tank le. Many bros here have sump and center support. No issues. If you keep building fail-safe to buffer against fail-safe to buffer against fail-safe..... hahaa not feasible la.
SPS better keep 20x le... you want to keep it as clean as possible. Since you are more the worried kind, then why wanna risk a lower turnover for the sake of a few baffles?