Arduino for STM32

Hi, there is a guy who goes by the "cbm80amiga" nickname who has some amazing libraries and a yt channel showcase them: https://www.youtube.com/user/cbm80amiga/videos https://github.com/cbm80amiga?tab=repositories I think he uses dma and the spi at 36mb on the bluepill, no overclock needed.

is it difficult to hand solder stm32 mcus? i've been thinking about this option since those cks32f103 clones seemed to be getting more prevalent. but of course these days there are stm32f401 & f411 boards https://www.aliexpress.com/wholesale?catId=0&SearchText=stm32f401. and they are priced...

Yep, I've made a few custom boards including an F405RG, the MCU's are pretty cheap on ali so...