Sota Cosmos

Either your pump could be failing OR its suspension has failed. The actual pump should be internally suspended by 4 little springs. 

Thanks for the insight on this, and I will check the motor of the pump and its suspension this week. I noticed that there was a hole in the bottom of the housing and the tech at SOTA told me that some of the older ones had adjustments knobs there, but were eventually not used any longer. 

I actually went to the SOTA factory last year. I drove around the entire country (and Canada) for some months and I was traveling through Wisconsin on the way to Chicago and I gave them a call. I need transport bolts for the Cosmos. They were supercool and gave me a tour of the factory. The guy who works on the tables wasn't there till I was leaving I showed him a picture of the Cosmos, but he said he needed the serial number to know what configuration and upgrades were done to it. He was cool and had a great shop. I thought the town, Delavan, was really nice (I thought the stretch between Minnesota and Chicago was gorgeous).

Lots of SOTA experience but none better than two gentleman above ^^^^^^
i do have thoughts on TT # of your soon to be thinned stable assuming you keep upgrade the SOTA : what work have you done to the SP-10 especially electronics,

arm, plinth and especially isolating it ????  DD drive and impact might be useful sonic foil to the SOTA and give you much more arm choices

I love hearing about SOTA turntables, and any turntable, so anything to add is much appreciated! 

The SP-10 was another lucky deal. I was at a radio station record sale in San Luis Obispo and amongst the records they had a bunch of equipment on the ground in the corner. The SP-10 was sitting there with an Audio Technica AT-12PT tonearm. I asked the guy about it and he said the speed doesn't hold and someone told him that it was not fixable. He told me to make any offer, and I offered $25 for both. It did not have the power supply, so I bought one used for $250. It doesn't hold speed on 33 or 45 (from what I remember) only 78. The chassis is in pretty good shape, only minor pitting. The goal after fixing, is to make a plinth and add a Transfi Terminator tonearm that I have in a box to it. Any advice on this approach or suggestions on tackling the speed issue? 

plinth and especially isolating it ????

I really only have experience with mdf and birch ply. I'd love to add different material, i.e. acrylic, steel, slate, but that would require a shop with exact specifications. Any advice on isolation, sandbox, magnetic levitation, spikes or sheer mass? 

@mulveling Thank you for the compare, very helpful!

There is a video showing the subchassis of the new Cosmos and it resmebles the plinth of the Millennia. It is a honeycomb-like aluminum plate. Looks quite substantial, far more so than the Nova subchassis. I wonder if anyone would comment of the Millennia, it is a table that is  rarely discussed, despite it being the TOTL in the SOTA universe. I hope it is appropriate to bring up the Millennia as the OP is on the Cosmos.