I'd mix up a batch of fuel using the 15% flow fuel.

Knowing that this isn't the ideal mix run it to see how is works.
Leave everything in place and give it a shot.

I did this on my first conversion and I knew I was on to something good.
It was a 32cc Mac that was discarded by another flyer when the EI went out.
It ran better on gas-glow than it ever did on EI.