Originally Posted by
Yarn or Fabric
Lol. I studied your posts before and after we started the project... There are several posts online showing people's altered desks... small world that I checked yours out

Hey! I'm glad they helped you out!
Part of your problem is the weight of the machine and the speed of it, for sure.
The juki is much heavier than a lot of the machines we use today. I would put it on par with some of my 50s and 60s Singers. The earlier Singers and the 15 clones still have it beat for sure.
The sturdier the table you can start with the better, and better still if it can have a permanent shelf that the machine sits on. You say the desk itself is pretty sturdy, so I'd do everything I could to make the desk believe that the shelf the machine is sitting on was always a permanent part of it. Brace like crazy!! Everywhere you can. Cripples, brackets, all of it.