Charles,
I hate weedeaters that said I love my scythe. I'm not sure which model you have but I'm guessing you went through the process of measuring your cubit and height in order to get the correct blade presentation. It doesn't really matter what your height is as long as you have the scythe set up to your body.
The blade you choose also makes a difference, there are longer curved blades that help you get up close to tree trunks. There are grass blades. Then there are the shorter stouter blades that allow you to clear brush and cut out small saplings. There are specific suggestions for blade size and shape, based on your experience level and the intended use.
This information is available on the Scythe Supply website.
I regularly use my scythe to clear weed vines from under large evergreens and to clear a fence line that runs around an acre or so. It is so much faster and more effective than doing it with a weedeater that I couldn't go back, especially considering that I actually enjoy scything.
For some, the downside of scything might be the maintenance of the tool. For me, this is part of the joy. I am far from good at sharpening and peening my scythe but I enjoy the process. If you are having a difficult time peening the scythe I suggest getting the jig-set that they offer, it makes the process quite easy.
There are also suggestions and videos on how to set the tool up and how to choose which tool works best for your needs.
Scythe Supply
If you learn how to properly use a scythe that is set to your body dimensions, it is quicker than using an electric or gas weedeater.
I think the European scythes are the scalpel compared to the U.S. version which is more like a butter knife. This is just my personal opinion of course.
When it comes to affordability I find that you get what you pay for. From wood- gouge, to battery operated drill you are going to pay for a good tool. If you know you will take good care of a scythe then I would purchase one that works for you. If you know you won't maintain it I wouldn't get one.
Maintenance is a must with a scythe.
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This is the video that introduced me to the scythe