【L-Flight】flf1635 Slim Green 's Japan Review

I have 3 sets of dimple slims, 2 green 1 black, none of them go deep into the L-shaft and they come off several times during play...
Maybe only the dimple slims don't fit because if I change to other L flats or different shapes, they go deep enough...?
The dimples are very durable, but the slim is the only one that has been disappointing so far!