Loss due to whiplash reforms

Contrary to my expectation - whiplash reform are here to deal with so be it.

I'm trying to ascertain how much of a loss in ebitda SGH would incur assuming whiplash claims are completely disallowed. Just thinking out loud here - please feel free to chime in and present your own conclusion if you feel inclined

So SGH wrote of 814 mil in 1st half last yr. They said 27% of that was due to the GO reforms
so 27% of 814 = 220 mil

At the time of acquisition SGH said they are paying 6.9 times multiple of Ebitda

So estimated Ebitda hit due to GO reforms = 220/6.9 = 31 mil p.a.

if we take ebitda/revenue = 25% - we are looking at a revenue hit of 120 mil p.a. from the whiplash claims

So updated Revenue/Ebitda expectation FY 2018 from SGH is around 870mil p.a. and 200 mil ebitdaw ?

my thoughts only - keen to hear what others make out of this ?