Is there lifetime warranty ?

My apologies to answer so late. We didn't offer a lifetime warranty. However, it seems like a lifetime warranty from other sellers who require " Customer is responsible for shipping to and from the factory". If I were you, I prefer the TURE 1-year warranty.

When the order is delivered. Do you have to assemble the press? Or does it already come assembled

Thanks for reaching out here. 3-Ton press completed setup except the driptech legs need to be installed by rosineer.

what is the name of the type of European plug that comes with the European 220v version of the press. I am not sure if a converter is necessary

Thanks for reaching out. We offer 220v European standard unit and plug, simply plug in and start pressing.

Are the presses packaged in plain cardboard like the plate kits?

The press is indeed packed in cardboard, but it was covered with very strong foam. 

The bottle jack no longer holds the pressure. How to fix it?

You will see a safety valve with the red cap on the bottle jack. Simply remove it off and rotate 90 - 180 degrees clockwise.  We don't recommend to do that If the bottle jack well works. It will cause the fluid leaking If overrated 6-Ton pressure.

On the bj-3t33. Can you switch the 3x3 plates for a size bigger like for the 3x4 pucks please get back to me. Thanks Rex. rcmoyer1062@gmail.com

Thanks for your question. dp-bj3t33 small rosin press is well suited to squeeze 3.5-7g flower or bubble hash. 3x3" sized plates are helpful rosin flows immediately off the heat to preserve the terpenes. If with 3x4" plates, rosin oil will be overheat become the dark. We got a lot of messages from rosineer only concentrate on less 7g material at a time. so we made such AIO press.