Imurg
The Grinder Of Pars (Semi Crocked)
No argument on that.Look at it from a different perspective: he completed 11 holes and performed well. His handicap should reflect those 11 holes of good play.
But by giving nett par -1 for the next 8 holes you're potentially diluting the score. Or strengthening it.
As I said, I don't have a viable alternative but I'm not a fan of using, effectively, made up numbers to produce a score for handicapping.