I run Dace towers, along with the MBX5 wing mount, for the upper screw in the FLM bulks, I just went to Lowes and purchased a package of M3x.50x16 Machine screw pan head slotted (upc#008236711202) and they fit perfect, and you cant even tell that i used a flathead screw under the tower.... no dremeling or modding needed....