I was under the assumption that all the Fox Forx Vanillas were adjustable from 80-100-125mm. Just that they were sold as either 80 or 100 or 125. Is that correct, or no? Could I buy, say, a Vanilla 100 and change the travel to 80 or 125mm of travel? I was just told i could only go down to 80mm with the Vanilla 100R, but thought they were all travel-adjustable. Anyway, I figure someone know better than I do. Thanks!