I've recently seen a new (to me) tool in the dog catalogs, which is a nail clipper that has some kind of laser deal that can show you exactly where the quick is with black-nailed dogs. Might be worth checking out...
However, I also prefer the grinding tools for nails, and GSDs can be so foot fussy<g>. Mine was.
One of the many early mistakes I made with her was to take her to the vet to get her nails done, since she was HORRID about it. I could hear her screaming from thru three closed doors as I waited for her in the vet's waiting room. (This, of course, was no doubt due to my not doing an effective job of introducing the whole nail-trimming thing to her... moved too quickly for her, used too much force, etc.)
However, this is a bad thing for your relationship, as it turns out. You should be able to trim your own dog's nails, and finding the best way to accomplish that is part of your job as her owner.
In my own case with my GSD, once someone explained this to me, I got to work on the training side, and using a grinding tool. Your dog is already used to the grinder, so your job should be so much easier! Still, start out one nail at a time, use great treats, and it shouldn't take long to be able to do her nails yourself. (You may have to back it up even more, and just treat your dog for touching the tool...letting it run near it's foot...take your time and start where your dog is comfortable, moving gradually towards the point where you can do all four feet in one session.)
One thing I found surprising during this process is finding the right position from which to do the grinding. The grinder only rotates in one direction, and depending on which of your hands is dominant, that will determine how you have to hold the grinder so that it's comfortable for you to use effectively. This is sounding more complicated than it really is, but if you start trying this, you'll find out exactly what I mean
. With a really bad back, I eventually discovered that if I had my GSD lie between my legs, on her back, snugged right up to my crotch, I could have her feet in the right orientation to be able to hold the tool and her foot/nail and grind effectively.
For her part, she loved getting all the treats, but every so often (and I'm talking after years, not weeks) I'd try to cut a nail with clippers...it would
always set us back with the grinder..so eventually, I just stopped trying that out. She clearly preferred the grinder and that was fine with me.
So far, I have used the rechargable battery grinders (I get them from hardware stores, as opposed to buying dog-specific brands, with which I have no experience). However, after a year or so of recharging, the batteries lose their ability to hold a charge, and it can be impossible to find a battery replacement when you need one (Craftsman for one doesn't make them...sure, they just want you to buy a new tool...). I think the next one I get will be corded...
Anyway, good luck and get to work with doing it yourself!
leih