VegaS2k

I am nearing my oil change interval on my Comptech blown AP1, and I see that it uses an AN8 fitting I believe. I am going to order an AN8 wrench soon, as I hear that these fittings are fragile, and the only good way to tighten them while minimizing risk of overtightening is to get the AN8 wrench for it. Is there a special way to tighten? golden rule as far as how tight is enough on these AN8 fittings? Thanks!

VegaS2k

update : This is the wrench I am looking at getting for it :

http://proweldperformanceparts.com/T...perCooler.html

Under "AN Wrenches-AN8" for 9.95 per wrench.