Attaching lee filter 105mm accessory ring to lee filter with longer screws without buying a tandem adapter/new filter holder.

I've recently purchased a 105mm ring and cpl from Lee. Usually I can take one of the 2 filter slots out of the holder and attach the accessory ring to mount the cpl. But I've run into some situations where I would like to have 2 filters in along with the cpl. It seems this can be achieved by buying a tandem adapter and new filter holder. But it looks like if I can find a longer screw I can mount the accessory ring onto the 1 filter holder on top of the 2 slots. Plus, this will make the mount shorter preventing vignetting at wider shots and prevent me from spending more money.Has anyone tried this or anyone know if this(longer screw) is commercially available somewhere or know the dimensions of the screw that I need to buy?Thank you in advance! via /r/photography https://ift.tt/2QUxEcW