Picked up a used portal transmedium. Tried to mount my Foil drive with Uni mast to it (m8 hardware) and it seems the tracks are too narrow to connect the t-nut. Anyone have an experience on widening the tracks? I only need about 1.5mm if that, of material removed but if I was to dremel it out what should I then cover the exposed area with to make water right? Full carbon board. Any thoughts are appreciated I was pretty bummed 
I am seeing this as a possible solution. Using an adapter for m6 hardware so it will fit within the tracks without any modifications.
I know a number of people for whom the supplied T-nuts were too big. I just used other T-nuts that already fitted.
The t-nuts will fit into the track, the larger m8 bolts that mount the mast are what are too wide.
Been using the M6 to M8 adapter for few months. Works great. Not tested for jumping though.