hi all...i too have had this problem i run a 3905 e-maxx and the 14mm hexes are useless and so are the plastic hex nuts. so i now use 17mm half inch offset maximizer beadlocks with sum custom made (by me) 17mm hexes and washers so the original axle and nuts can be used. my wheel nuts do come loose now and again when i run 6s. so use new nylock nuts to solve that problem or try some locktight. plastic washers will be no good so get some ally ones. i dont see a problem with nuts with rounded edges as long as they fit snug in the wheel, the problem is alot of these hexes are actually oversized in the wheel and undersize on the hexes, like the ones i made needed to be 17.30mm +/- 0.05 to fit the max rims snugly so a good fit is best and check the nuts are tight before every run. loose nuts will kill hexes well quick and if you glue your tyres (this is a costly problem) hence i run the beadlocks. if the hex strips (which it dont) all i need is a new face plate for a few quid not 2 new rims and 2 new tyres. if you wish to see a piccy of my hex nuts and washers see my post in project x, they are made from 6082 t6, bye all...