I've owned my 2008 ibiza for 6 years and I love her to bits. Two months ago I had a problem with the handbrake going slack and binding, I thought it was the calipers seizing so I put new after market ones on, including the slider pins. All went well for a month then the problem resurfaced. Noticed handbrake lever no fully realesing. Is this a common problem or do I have to get new calipers again? Any advice would be greatly appreciated.