Analyze the Stihl FS 90 R

What happens here

Examine the Stihl FS 90 R string trimmer in detail. The creator highlights its commercial-grade construction, 28.4cc engine with 1.27 horsepower, and 50:1 oil-to-gas ratio. He mentions its 16.5-inch cutting swath and explains that he has removed the factory guard to increase the cutting area. He also points out the string currently loaded is not the original Stihl brand. A key challenge with this model for a tall user (6'5") is the need to hunch over, leading to fatigue during long work periods. The video explicitly mentions that they are discussing weed-eating for 5 hours around the farm, not just 20 minutes around a house.

Goal: Understand the specifications and ergonomic challenges of the Stihl FS 90 R.