L7 & L8 is not an expansion stress.. its sustain stress.

And im not sure if its okay to do HOt sustain in this way... instead i will suggest, add separate L7=T1+D1(exp) & L8=T1+D2(Exp) and minus it with L3 & L4,. L9=L3-L7(sus) & L10=L4-L8(sus). as basic guide in CaesarII tech reff.

But Lets See what Sir Rich can say about the case of hot sustaining your L7&L8.

Regards,