Don't know if this would work for your tartans, but it works great for my non-traditionals, its on another thread but can't find it...

I dry my kilt from three WalMart plastic hangers with triple clips on each hanger. Put it on the shower curtain rod.

Then bought about 50 extra hanger clips (by the hangers at WalMart). Went over to the fishing dept and bought 50 fishing weights - 1/2 ounce lead with an eye at the top.

Just tied the weights to the clips.

After hanging the kilt I clip a weighted clip to the bottom of each sewn seam, inside and outside pleats.

The weight of the clip pulls the pleats straight while they dry. No need to iron.

A bit of up front work tieing the fishing weights to the clips but a breeze after, no ironing, and a lot cheaper than using fancy/cute tablecloth weights.

Ron