I am fairly new to the trials scene and I am currently riding an Onza T-Comp which has two Magura HS33 brakes. I was wondering which would be the best method of enhancing my brakes or if i should leave them alone all together. Some people have suggested that i put a grind on my rims and others have said that they have used tar in the past and found it has a good impact upon the effectiveness of their brakes. Any advice that anyone has to offer will be greatly appreciated thanks. Kieron