I have a Cannon Unitroll HP downrigger. The first time I used it I realized it had no brake. It is either full on free spool or locked, brake on. After 2 days of use it became extremely difficult to to get the brake to reengage at all after allowing weight to descend. Looked at the schematics online and found it difficult to discern which parts may need to be replaced. Anybody have any words of wisdom on what to look for before I begin tearing this down to inspect parts? My other cannon downrigger has a very good brake that allows for controlled descent.