SpyderTracks
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OMG, man, ignore me, I've had to watch the videos through again because my brain seems to melt on a weekly basis at the moment.Maybe I'm misunderstanding, but I thought the pump was best to be at the lowest point of the loop?
There's a much easier to follow video by Jayz2Cents here which sums it up really well:
But yeah, you're right the pump needs to be lower IF the radiator hoses are up the top.
If you can just swap the orientation of the radiator with the tubes at the bottom, that would be the ultimate way.