An aluminum extrusion is nice because it will be dead-straight, but you will pay for the convenience. The stuff is pretty expensive.

> Does anyone have any exprience using aluminum extrusion for a box-beam
> instead of wood? I'm thinking that buying the 2x4 extrusion will save me
> some work by not having to build a box-beam. Would I have headaches
> attaching the frames to the beam?

> Another reason for using aluminum is that I will be building my stripper
> in my apartment's living room. Last winter, in my living room / workshop I
> had some panels of my Pygmy Arctic tern warp due to the moisture in my
> apartment (from showering, cooking, etc.) and am worrying that a wood beam
> may warp. The 2x4 that I used to ensure a flat, straight keel warped
> pretty severely.

> Thanks, Dean