Ive bought a 29” 1278 gram carbon 30mm internal set from EIECarbon for my Rise M20. Made a really big difference in ride feel and performance. Costed me ~£890
Downgrading with your mobile phone is really easy. Doing this with an Android phone is prefered, using an iPhone is nearly impossible. I've done it 8 times now.
Follow steps provided by ST-Unlocker to downgrade.
After downgrading, set to US spec.
Next upgrade the firmware again while keeping it...