a friend of mine has the slingers on his wake.
once i wanted to try them out - with my left foot, i had a perfect, tight fit, butwith my right foot, it was way to tight (well, that's my feet - the right one's got more width in the front half).
when i tried em again about 25 riding hours later, the right foot fittet perfectly but the left foot was too loose (he didn't modify anything)
do the slingers get loose with time or am i shrinkin' ? ? ?
slingshot sandal cuffs gettin' loose with time?
no question - you´re shrinking !! 
)
maybe you tried them newly - it´s a real tough construction but maybe the foam in the strap (there is some padding inside !) as well as the strap band itself widened a bit - as it does with other straps .. you´ve two screws for adjustment on both sides, so it should fit after one re-customizing ! I´m totally stoked about the new feeling, board control is of another world !!
aloha
Hangtimer
)maybe you tried them newly - it´s a real tough construction but maybe the foam in the strap (there is some padding inside !) as well as the strap band itself widened a bit - as it does with other straps .. you´ve two screws for adjustment on both sides, so it should fit after one re-customizing ! I´m totally stoked about the new feeling, board control is of another world !!
aloha
Hangtimer