I know it's not your questions, but if you are trying to use HGE for collecting high grade manufacturing materials, I used to use the relogging thing you tried, but these days I go to High Res sites (not haz res) in a combat ship loaded with collector limpets.
If you've not done this before, it is 'relatively' safe (as long as you don't take or collect any cargo) and you don't need anything particularly special. I used to use a Krait MkII, though these days it's the corvette, only cause I can. Head to high res site, then follow the cops and help blast any wanted targets and let the collectors do their thing (the more you can spawn the better really). I know it won't be many high grades mats (though some), but you'll collect a lot of stuff, quite quickly if your lucky and RNG is with you. It's more fun (or mabye it's just me who like to see things go boom) and you earn extra credits. Just make sure you get a least a couple of shots on the bad guy befor ethey die. If things dry up, leave, head a couple of Mm away then head back.
I know this might not help much if you are looking for something specific G5 right now, but I have got into a routine of doing this now and again to stay topped up even if I don't need to, then mat trade to whatever I need.
Still, hope it helps, and whatever you do, happy hunting CMDR.