PVA has potential as a support material, but the reports I've heard (I haven't tried it myself) indicate that it won't stick to PLA, so it doesn't work too well as a support for that material. Apparently people have had more success using it with ABS. If you try either of these things, please report back and tell us what worked for you. But yes, it would be best to start a new discussion thread for that.

Andrew Werby
www.computersculpture.com