So I used up all of my old stash of SGM silkspan recently and thought "OK, I'll just jump on the Google machine and order some more." And then I find it isn't so easy and start reading posts here and there about how new silkspan isn't the same and that some supplier's idea of "heavy" is about what the "medium" used to be.
I've covered planes with silk, dacron, forms of monokote etc. at various points in my life, but silkspan is my comfort zone. The stuff I had was from SIG and had been rolled up in a box since I bought it about 25 years ago. It was about as perfect of covering material as I could ever hope for. and I probably paid less than a dollar a sheet back then.
Is the real SGM still available ?? I'm pretty abusive when covering with it and never liked the GM medium weight.