I bought it off mk motorsport years ago,I think people have had trouble in the past with these and heavy covers but I think the bearings were to blame,i know Martin@reyland has had no issues with his.
I'm just using a standard cover for now,but I'll not hesitate to put a heavy cover on if need be.
Those cylinders do sit close to the floor you can mod the tunnel for more room if your happy to hammer the floor,which i wasn't.