Grand Prix Attack game leads to draw

I tried to use the Grand Prix Attack in my first club game of 2018.  I had a huge time lead during the 'middle game', but my opponent found what looked like a simple way to equalise by doubling rooks on the f file .... I was a pawn down, so accepted the draw that was offered!

As usual, any comments welcome ...

Grand Prix Attack

PGN Viewer courtesy of http://chesstempo.com/