Nice! I recently did the same thing. After our old springs broke after only about 6 years, I ran some calculations and realized that if I replaced them with standard springs (rated for 17,000 cycles), I could expect no more than another 4 years. So I spent the extra 50% to get longer, heavier-duty springs that'll take 65,000 cycles, so I don't have to do that job for a good long while.