Does LSA show up on a LSD drug assessment?
Answer: You shouldn't do drugs...
LSD only shows up on Extended drug try-out and most folks aren't going to shell out that much $$$$ for a drug test.
As to the LSA cut, I don't know what LSA is. Sorry.
OK I found some info here.
http://www.erowid.org/chemicals/lsa/lsa_...