Cheers, I like your site with all that yummy GorkaMorka stuff - lovely game :)
I had this idea a couple of years ago to combine Necromunda with GM, but unfortunately our group kinda went into a "ugh, played this game too much" phase and the plans died...
Been having thoughts about bringing it back to life again, but Im afraid the old discussions about rules, LOS (lineofsight) and Cover would come back as well.
When we're working on rules we try to always remember that the most important thing is that the finished product has to be fun. This is carried over to when we're playing - we play to enjoy ourselves, not simply to win, so as long as lines of sight are about right, it's fine. When I think about it, most of the time we find cover grants -2 to hit, although occasionally there's light cover but it's very much in the minority.