I had a leak on one of my V drive sacs around the black fitting. The bag was less than a year old, but I had no proof of purchase and couldn't remember where I bought them. I sent it in to fly high to have it repaired, fully expecting to pay for it. 4 days later, I had a brand new sac sitting on my front porch, no charge.
Thanks to fly high for going above and beyond. For all they knew, the sac could have been 5 years old.} Not that I would ever buy a different brand of ballast, but this pretty much solidifies it for me.