Husqvarna 326ls trimmer

I bought a husqvarna 326ls in the spring of this year because my $60 weedeater wont start after two years of around the house use. But the main reason i wanted a pro series trimmer was for brush clearing. I bought a grass gator for it but haven't installed it yet. I was really wanting to find a brush cutter blade that this trimmer can handle. I put a aftermarket string attachment on the 60 weedeater and it just melted everything off the shaft it got so hot. I just dont want to ruin a $300 trimmer by using the grass gator or brushblade if i can even use one.