HI all, I'm working on optimizing my Brompton T Line 12-speed for lightweight touring across Asia, where minimizing weight for multi-modal transport (bike + train/bus/etc.) is a top priority. I'm interested in going with carbon wheels to save as much weight as possible.

I've done some research and have a few questions I’d love input on:

What I Know So Far:

• I’m aware of the limitations of carbon rims, especially in wet braking and aggressive downhill scenarios — but I’m willing to work within those tradeoffs in exchange for the weight savings.
• I’ve noticed many carbon wheelsets are marketed for 1-speed, 4-speed, or 6/7-speed Bromptons, but almost never for the 12-speed T Line setup. I'm assuming this is due to the Sturmey-Archer 3-speed hub used in the 12-speed, which is trickier to accommodate with standard off-the-shelf carbon rims.

What I’m Trying to Figure Out:

• Has anyone successfully built a carbon wheel using the 12-speed T Line rear hub (i.e., lacing a carbon rim onto the SA hub)?
• Is it feasible for someone without prior wheel-building experience to do this, or should I definitely go through a professional builder?
• Are there any carbon wheelsets or rims compatible with the 12-speed Brompton that are already out there (and maybe just under-advertised)?

Would love to hear from others who’ve tried to go this route — what worked, what didn’t, and any specific product or service provider recs. Don’t want to go in blind if there are key limitations or tips I should be aware of.