Trouble with flashing FW on SKR 1.4

I have a Tevo Tornado (Gold edition) That I previously had no issues with running Klipper. I then decided that I wanted to upgrade my stepper drivers to some TMC2209s. I bought the BTT ones and found that they were a pain to install on the stock MKS Gen L 1v.0 board.

I figured it would be easier to go with the BTT board since it looks like UART is supported out the door. I bout the SKR 1.4 board and received it.

For the life of me, I cannot get this thing to flash firmware. Here is what I have tried.

  1. Followed the same tutorial that I used to install klipper on the MKS board. The difference here is that I had to use an SD card. Tutorial states that it may be necessary to do this, and specifically mentions BTT. I was able to see that the firmware changed from firmware.bin to firmware.cur on my SD card. https://all3dp.com/2/klipper-install-simply-explained/

  2. One thing that I have a concern with is that the menu config options are not explicit anywere. The klipper repo does a great job on most config of commenting at the top on what options are required for the FW. The one for SKR 1.4 does not. There was also mention of smoothieboard somewhere (I lost it in my 1000+ tabs in my browser).

  3. I grabbed my SUB<>TTL and tried to follow the steps outlined by Sineos on this GH page: https://github.com/bigtreetech/BIGTREETECH-SKR-V1.3/issues/346 I can successfully get FlashMagic to push that file (DFU-bootloader.bin)

  4. This is where I am stuck. After I load the bootloader with Flash Magic, I still cannot get the firmware that is generated by Klipper to work properly. If I run "ls /dev/serial/by-id/*" in my SSH from the SBC I get nothing. Same result if I SSH from two other devices. I also cannot see the device from any other machine.

Any help is appreciated. My new bambu A1 came in yesterday. I set it up and was running fantastic prints right off the bat. I love to tinker, so I will stick with my tornado project, but it is awfully nice to just have a printer work out of the box!