Can anybody spot what is probably a newby mistake. I have just built my first bench and flush fitted a 9" Record vice with quick release. Making my life difficult as usual and in order to cut the smallest hole in the apron I dismantled the vice to enable me to cut the opening really accurately then rebuilt it once in place before fitting the quick release worked after it doesn't, the level is now too close to allow enough movement of the nut. The spring is wound tight, the nut in the correct place and the plate appears to be in the correct place in the clutch and housing?