I have been making rods on the spg blanks for a couple of years now. The lightest blank is the 780. The 720 makes a better 5wt. The 780 makes a good 4 or 5wt. I have one for sale on my site that I extended to 7' for a 4/5 wt. As far as your question, the spg's are faster than Lamiglas blanks, which I also offer.