This is my first posting on the site I have had 2 V11s for about 6 years a couple of months back I noticed the nearest I can describe as Measles on my 2004 Rosso Corsa petrol tank. when the pustles were pricked petrol fluid came out ,after much trawling the internet Ethanol seemed to be the most likely cause as nothing had fallen on the exterior of the tank, So and here goes I intend to build a steel tank to sit inside the old tank and keep the bike looking original the old unit has been shot blasted and the bottom cut out , I wish to replace the bulk of the air box for added fuel tank size and maybe run on K & N units on each injector ? I would be more than happy if any one out there has done this or has experience with K & Ns or other filtration ideas and also advice on what to do with the MAF switch? , I know many of you will say just buy another tank but with the increasing amount of this evil stuff in petrol we will soon run out of replacement tanks so there may be room for a steel tank conversion kit as the long term fix?