I can't say I've had an opportunity to try. The St. Augustine grass is way too risky to go over 350, any time I try I regret it with chunks of turf coming out.
I'm really surprised at all the tight places I can maneuver into. I feared not being able to get a nice close job done. It's tempting to sell the Turfco XT5 altogether. The opportunity to back into places & hang over the edge makes a huge difference. I always had to contend with the handlebars on the xt5. Is it a huge deal, probably not, but I have had customers thank me for doing such a thorough job.