Liam, I've gotta agree with the others.
I've looked at your vid and whilst the lower arm seems to move smoothly without bind it is a whole different ball game when aggressively accelerating or braking.
My RMC (like the G-Force) has a longish straight trailing arm which seems to work ok with an adjustable heim at one end if adjusted properly. But I'm not overly in favor of it.
For what it's worth the following pic shows the only system I feel works adequately to relieve the forces on a Jag lower arm in our cobras.
