I have a 5 pin sight on my bow, which i can make it a 3 pin if i like. i have the top pin set at 10 yards, third pin at 20 and plan on putting the fifth at 30 yards. my questions is will the second and third pin, if directly between the others, be the half way mark (ex. will the second pin be 15 yards because between first and third pin?) If not, is it easy to make a 15 yards shot if i just put my target in between the 10 and 20 yard pin. I would prefer having just the 3 pins, but if 5 is necessary to have all my yardages, i will do it