This is the 3x3x3 that I designed in 2009, but after seeing the Shuang Ren, I considered the pieces to be too similar, so I didn't post it.
I am posting now because I decided to prototype it and compare it to the Shuang Ren. These are the SolidWorks models:
ZZZZZZZZZZZ T2 1.png [ 158.05 KiB | Viewed 511 times ]
ZZZZZZZZZZZ T2 2.png [ 198.35 KiB | Viewed 511 times ]
ZZZZZZZZZZZ T2 3.png [ 259.37 KiB | Viewed 511 times ]
I didn't want to be accused of copying the SR, but I think that you can see how the T3 evolved from it.
What do you think?