It's been a long time since I partook in MOT stuff, but like the Evil One says, they should be ok as long as they work and it's not leaning over to one side!!
On the subject of springs, I'm shopping for pairobollix springs for Larry, Britpart are affordable, but how do we know they are made specifically for Britpart, and not just made enmasse in bloody China and then labeled by different companies?
I do most of my shopping at Buckley Bros, It's all Britpart, and I've had no problems yet.........