Thanks Troggy
I did try and use the instructions from that thread. I downloaded both the ROM and also the TWRP file that I renamed recovery.img. I put the recovery.img file on a formatted sd card and stuck it in my box....I pulled the power cord, then did toothpick and then whilst toothpick was pressed I put the power cable back in.......nothing happened other than my TV screen going black.
cheers
All I can really say is it took me a few goes to get the toothpick right - make sure you can feel the switch being pressed down / released.
Have you looked at the files in the Beelink forum as an alternative? There are how-to videos, a link to the usb burning tool, firmware downloads - and no TWRP.
It's hard to say why it's not working for you - because all I had to do was follow the instructions in the thread I linked to.