Bought a Husqvarna 128LD just as a lighter trimmer and to get attachments for down the road, edger mainly. It came with their T25 head. It doesn't seem to like feeding string very much, like once every 5 or 10 tries. Has this same behavior with both the titanium force that came in it and some twisted string. Are they known to behave this way, or require breaking in? I ordered a knock off speed feed for it but was just curious.