.35 total on duals is within the limits certainly.
Are you using the standard spring? That's gonna limit you for certain. Secondly, I would make very sure that your button is uber-clean with no grey arcing along the button sleeve or button assembly. Toothpaste works as a polish and usually where I start before I get out true metal polishes or the 0000 steel wool. Lastly, make sure your compression band is clean and shiny. A little mild toothpaste and occasionally some scotch brite as a polish pad.
Any other questions hit me up!
vaping away happily on my Ti ELA with Zenith on top. .25 duals.