Thay are fast for me but then I have cable 8meg down and 756kb up.

There are a lot of good info in there even if you have years experience.
Dow use to have a nice video I dont know if thay still offer it it cost $9.99 I believe
also polytek and Smooth-on have videos thay cost as well.One last thing polytek has there
mold making and casting catlog on line for free it is in PDF.It is well worth the time to down load.
I have tons of links for mold making and casting if you ever looking for something just let me know ill see
if I can help.
rodlrock