After some thought decide not to upgrade.
For me the pricing rubs me the wrong way.
Just cutting the original play in half is not fair to the original owners.
Spending 1200 for a plus as an early adopter is too much.
Not knowing what the real costs and margins are for polyend. If polyend chose to lower the price to 600 and the plus to 850 and have the upgrade be 200 I would have take that deal.