A thought, rather than a recommendation - I’ve noticed that I use my Palm twin paddle key mostly as a single paddle, eg slapping either Dits or Dahs. About the only time I use it in iambic mode is calling CQ!
(but I’m not selling it
This is largely laziness on my part, in not taking the time to practice using it properly, but also partly because it is easier to do with cold stiff fingers on a summit. On the other hand, I find that sending at 16 to 20 WPM, which is about my comfortable range, and exchanging the small amounts of info that I typically do, iambic would be no great advantage.
So, if I were looking to build or buy a new paddle, I’d probably be investigating a single paddle, which is rather more simple to build, and should be a bit cheaper to buy.
As I say, just a thought, YMMV.