The 100uF Cap is an electrolytic, non-polarized,\n\nIt's gonna eff up those chocolatey mids. :D\n\n... but yeah, you just saved $65.\n\nThat would keep me awake at night though. Given how much work you're in for, the $65 might not be all that much but I do understand the size cosideration. You still haven't given us the specifics of the project so it's hard to see exactly how much of that xo board comes apart. I got lucky in finding a Weller Desoldering Tool used somewhere for not much money. It is a painfully slow process to clean up used parts. I'm glad that's behind me. I wasn't doing it for a learning exercise. I wanted the speakers as keepers so I felt I had quite a bit riding on the effort. The boards also ought to have the same layout with regards to inductor positioning. I'm reminded of my DIY'er re-do and I don't mean in a good way.