Jaymz
Stymphalian Productions
I would recommend that very strongly. Hell, my Eb is a 52 (Loomis uses a similar size if I'm not mistaken) and that seems a little loose as it is. You won't regret trying a 70 - I use that one all the way up to C# and won't go back to anything else.
Jeff
Indeed, I shall give it a go and your right on Loomis' 7 string the Bb is a 70 and the Eb is a 52 Its basically a Ernie ball heavy top skinny bottom set with the 70 added on top. Its just everytime I try a new gauge (thats thicker) I have to get my guitar set up to accomodate them. Shame Im not confident enough to tweak it myself