I ment more the process of taking the lower apart and getting it back into the guarder frame , it’s just a bit fiddly . Filing a tab off a soft bbu is easy (to me ) in comparison .  
	 
 
	 if you are slow and methodical with a clean work area and properly fitting tools it’s really very simple , if you are heavy handed , in a rush and trying to use the tip of a butter knife on screws then you will struggle .