400 with TF 240 heads - valley plate options?

Yeah it's been said like five times now that the stock valley plate will work. Is ya deef?
LAST I READ WAS THE STOCK ONE HAD TO BE CUT OUT TOO FAR .
GOTTA ADMIT NOT REAL INTERESTED , MIGHT HAVE MISSED THAT---------------AND YEAH UP TO A CERTAIN POINT THEY SAID I WAS STONE DEAF, FOR SOUNDS BELOW A CERTAIN POINT .