It can be done, these Germans sell programmed Bosch motors you can buy US variant and provide your bikes information and they program it for you:
https://ebike-doktor.de/shop/index.php?route=product/category&path=38
How safe is tuning nowadays? My commute involves many long, flat sections where I can reach speeds of around 40 km/h. Are error codes more likely to occur when riding at a faster pace?
Are there any options for quite expensive Dengfu $1000 frame? I'm trying to build something with 2300 dollar budget and 1000 dollars on frame is too much. Something like 300-500 dollars would be better.
https://eshionbike.en.alibaba.com/product/62152257786-812261487/bafang_M620_full_suspension_mid_drive_electric_bike_mountain_e_bicycle.html?spm=a2700.shop_plgr.41413.18.20d06fd9V5M6G2
You have this? Seems like they only sell ready made bikes though.
Are the Mezcal's puncture resistant? I was going to get super moto-x but they are only 27,5 and I have 29er bike. Looking for durable commuting tires for my emtb.