400 or 430? - 1 year ago

Hey, I just got rid of my 430 SC6 that I did not find suite my Simmer Iron 5.7 (2010). The thing is that I now am hesitant to go for a good 430 rdm or just use my 400 rdm-10, with a long extension, to my 5.7 (luff 439) which is my biggest sail. My thoughts are if it would be better to use the good rdm-10 400 instead of a rdm 430 with a moderate level of carbon, ca 60 %. I do not want to pay th