mine was doing exactly the same bud, the slave doesnt really have enough throw on it imo, slot the holes on the slave mount bracket and slide it closer towards the engine just by a few mm will make all the differance, ive slotted mine out so much now i went through the back of the bracket ! lol i wanted maximum force on the clutch plates to get it released and it worked. im a mechanic by trade on civil engineering and agricultural equipment and have lots of experiience with repairing machinery and the clutch kit isnt made properly well the slave mounting bracket anyways, its not good enough tbh.