I replaced my Polini Banana with an EGIG Super
Banana touring.
It was very easy to install and the upgrade paid off well. The powerband is very smooth, but the high rpm range increased nicely with tons of torque.
I'm using it with a Malossi 136 cast iron, and Malossi Reed kit.
It's very rideable, but I need to up the gearing a bit.
I was on the fence after reading it required frame mods, but that was with a PK which EGIG states it won't work on a PK.
Long story long, it is a great upgrade.
