I put in two blinds today. Holding the heavy drill up and cutting the heavy material to adjust them took a lot of effort and upper body. 
 
I predrilled and screwed the holes so when I used screwdriver on the actual brackets it was doable. But I still needed to take a lot of breaks to recover my biceps on each screw. (My drill doesn't have an extender that fits the brackets.) 
 
You know it's bad when holding a screwdriver gently just above eye height is a massive effort. 
		
		
		
		
		
		
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