01-17-2009, 10:36 PM
You also mentioned talking about a set. The picture above shows my layout when I was using 4% grades. A 4% incline rises 1" in 2'. A perfect match for 1" layers of foam. Later, I decided 4% was a bit too steep and with a slight layout addition and some finangling, I managed to reduce all 4% grades to 2%. Even so, it only took me 4' to rise the same inch. Thus, I only purchased boxes of 2% incline starters and with the use of 1" foam, never found the need for the sets.