Hi l have a R4 but need a mast will the newer SDM 75 work or should l look for one of the older masts like the Blueline.
R4 overdrives are not at all an "old" generation of sail. A new severne SDM should work perfectly with it, be it a 75%, 90% or 100%
As Subsonic said,they are fairly new,the R4 was only released late 2012 for the 2013 season 
Thanks for that info, will order a replacement. I was using an older Flying Objects 100% but the outside of the mast started to splinter where the top cam was against the mast.
