Thanks for the feedback.... I went to the LHS and asked for the Trinity 4505nt cross cut 99 brushes and got the 'deer in the headlights' look
(and these guys race on road)...they finally found them on line from one of their distributors, but I'll be racing before they can get them. I will look for them in Denver. I did get the red springs and had some purples. The putnam combo sounds good too. We have two days to test before the races so I will have time to experiment. Any other input is helpful....Thanks to all again!!