Well, I've finished cutting and sanding the small enclosures for my full-range drivers that I built out of oak. But there are some gaps that need to be filled in with wood filler/putty. Is there a certain kind I should use? When I stain the oak I don't want the wood filler to be a different color. Speaking of stain, what brand/type do you guys recommend? I've never stained anything so methods are also more than welcome. Should I use a sealer or a clear coat? Thanks!