Dropping an update to anyone who's interested.
For the manta lovers, you'll probably realize that the orings make the top cap way too tight. Grab the 1mm thickness, 19mm inner diameter orings from theoringstore. I have the double orings in now and it fits PERFECTLY. No more struggles with getting the cap on or off, and no ripping of orings.
For the thump, these babies don't come with spare orings. You can get the 1mm thickness, 18mm inner diameter orings from the same place. Fits perfectly as well
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