Hi everyone, Excuse me if I am posting wrong but I think this is the right place? This is my first post. I am starting off riding trials I acquired a bike about a week ago and have been riding it non stop. I have been able to do some basic things, endo turns, trackstands, and I can do about three or four rear wheel hops before I tip to the side or fall forwards/backwards. The more I have been practicing back hops I have noticed some struggles with the back brake preformance. It is a Magura HS-33 (Pre 2005) with upgraded pads and the rims are ground. (I’m using 1 finger as I do with my other bikes) The burning question is should I attempt to re-grind the rims and just mess with the brake pad distance from the rim? I spent about an hour last night with no luck. Or should I look for a brake booster, or maybe even just get a new set of the HS33, they are on sale for like $90 at chain reaction cycles, and those come with a booster. I am a high school student with a pretty limited budget but I would rather make the right choices that would last me longer than have to buy More Things in the long run. I weigh about 160 pounds and I’ll attach a photo of the bike. It’s older. Thank you! Sorry this is so long.