Hope your well. There are many opinions on the subject of polishing and we have discussed many times. Personally, I prefer Autosol metal polish as many with high end
devices. Many here also use Cape Cod cloth and/or Sharkshide. Of the two I would say Sharkshide is superior but, Cape Cod is a solid choice.
Even Mothers is a great wax/cleaner. It would be personal choice of the ones mentioned but they are all good but, again I am a fan of Autosol and/or Sharkshide.
Just make sure if you deviate from these to stay away from products with grit or abrasive properties such as Brasso.
It sounds like you may have purchased the tubes used? The V3 is delivered from Vapour Art and Domo with a long and short pin for the GPin that is easily interchangeable for various
batteries. Sonds like you only have the short pin installed. If this is true I would be happy to send you a longer pin for your 650 connection.
The 2.1 being an adjustable telepost there are a couple of battery posts. One has a thinner head and the other will be thicker to allow "more reach from post to battery nipple.
Note, this may be the first time n my GP history that I used the word nipple legitimately. There are days that I just can't be too proud of myself.