Replying to Binding adjustments on Kartel. Help needed!!!

Whatsup NS, I just bought a pair of ON3P K98 DEMOS with Tyrolla Attack 13 bindings. The guy from ON3P said they are mounted at the recommended line and fit for someone with at 27.5 boot size. I have a 29.5 boot and I was wondering by having a larger boot would that force me further back from the recommended line by having to adjust the heel back to fit properly.

The guy was saying that the toe piece can be adjusted FORWARD and the back piece BACKWARD so the center on my foot will still be on the recommended line.

Can anyone provide some clarity who's very experienced with bindings as to what my options are? Ideally I would like to be on the recommended line or even more forward.... not more back on the ski because of my boot size.

Thanks all