So you replaced parts who's current main failure mode is less capacitance with a part who's known normal failure modes are burns up in flames taking out the PCB or short circuit taking out the parts before? And we won't even touch on the questionable ethics of Tantalum. I have NEVER seen a quality electrolytic made after the mid 1990s leak unless it was over temperatured or over voltaged. I'm pretty sure that is a bygone problem.
Doesn't seem like a smart move to me. A modern LOW ESR 5k hour 105C electrolytic should be far Superior to Tantalum with the ESR going 2-4 octaves higher with a safer part. You could possibly use a X7R or X5R MLCC for even lower ESR that goes 10 octaves longer and reliability but some of those older circuits are not ceramic stable and X7R/X5R are micro-phonic, where other options are not.
