I've got a hadley with a 15 to 20mm conversoin axle (turner comes with 12 to 20mm) Looking at the hub it seems like there are two hex key holes on the sides where the axle would go thru but they are way too small to fit the 15 to 20mm adaptor? I dont have a wrench so i couldn't turn the hex hole thingies out but is that how it goes in?