Is that the unitank that comes with the Supbox? If so I'll try that trick myself.
There are two of them included. One with a black Delrin bottom and one clear bottom. You want to use the black Delrin bottom one.
Make sure the Abyss PnP bridge bottom will fit inside first. Then trim off of the upper lip of the bridge to fit.
That bridge that is inside of the SXK Unitank will also fit RPM coil heads I think. I don't have any RPM coils so I'm not sure.
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