Righty, ive got a try-all hope trial disk brake, and at the moment i'm only running a 160 rotor because i havent got the adaptor for the 200 rotor. The disc just wont hold at all, it will slow me down sharpish and it will hold under me rocking front to back to keep balance but if i need to endo or gap to the front it wont hold my weight at all and just slips. Also the lever feels really spongy. What can i do to make it hold and reduce the spongyness. Also the disc will never line up with the pads and allways rubs, any ideas to help space it out.