I was wondering what size of heim joint is best to use for the struts. I've seen ppl use 1/2 -20 and 3/4 -16. Obviously bigger is most likely better, just would like a second opinion. Also where is the cheapest place to get these, whats the goin rate? I found 1/2-20 for 14.99 and 3/4-16 for 21.99 at the local farm store.