Because Vince change the delay of T3, L1A in L-HRS comes 75ns in front of retiming signal,after I put retiming signal back to what it was (which means that it does not go through the second channel of DIS, hence reduces 10ns delay). I can put L1A back into the delay module and add delay on L1A anytime remotely if it is necessary, for example, reducing deadtime, but I will still leave the L1A without going through delay module before someone told me to.