Scorpio one is 21mm, but ONLY from bug eye scorpio, SALOON, no other one is the same shape, the later granada type scorpio is different.
I have now adjusted my set up, 22mm thick rear bar, custom made of course.
AWSOMENESS is the understatement of the year, more comfy, less roll shit loads more stability, esp under heavy braking.
The biggest problem on some is clearance around poly diff mount.
Anyone that says 2mm is too much imo has not tried it, cozmeister can at the weekend, I'll let him tell you what he thinks, the one made has three stiffnesses anyway for experimenting.
It did intially induce understeer, but one complete turn on avo adjuster makes front dig in much harder, strangely it has got a LOT more comfy with harder settings with new rear arb, mines on middle hole, which is same length/position as escos.
tabetha