You'll have to cover the block in neoprene, swiftechs being the shape they are are'nt realy 'cut out for the job'

. what happened to the bottom of your block?, it looks like one of the moon landing photos'

, after lapping you should leave it overnight so it oxidises, otherwise ArticSilver can react with, and pit the surface!...
I don't know where to get it, but you can get neoprene sticky tape now!, this would be handy for the conden'proofing

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If you find a refridgeration company suplier/repairer they would have the exact same stuff for pipes that fridge/freezers use in handy sizes. normal insulation is as good but maybe not as flexible?, you don't want it kinking/pulling~away from the pipe on tight curves. it has to be
very snugly fitted...
The pump I'd just put in a tupperware/airtight plastic container with the in/outlets silicone sealed up. or put it outside the case

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