If you do decide on getting a RBTA, I found the best way to get them to attach to my LR is to rest a piece of eggcrate against them overnight so they can't blow around (I bought mine loose). 
Once attached, mine (luckily) stayed where I placed them. 
I put them front and center-ish and a bit lower. Out of direct powerhead flow, but enough for good flow. Been almost 3 years now. 
		
	
		
		
		
		
			
		
		
		
		
	
		
		
	
	
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