I've never had an issie using braid on my downrigger rods, or for any rod for that matter. The last couple years I've bumped up to 50lb spectra because the 30lb is such small diameter I have troubles keeping it in the clip when fishing deep, since going to 50lb its a lot better. One thing you should consider is the difference between braid and spectra, there is a big difference and its not just price. I don't run mono on anything anymore, other than for topshots on tuna gear and some bottomfish setups.