I recently broke the rear arm on my 14 summit xm. its got a toms suspension rear arm in, i contacted toms and there offering to update the parts at a discounted rate. i still have the stock tmotion parts and zbros said they would sell just the brackets as i already have a shock that will fit. i do have a question, anyone have any experience with the zbros coil over conversion kit??? any issues with it longevity wise?