Mike ,
First off, appologies for casting a shadow of doubt over the C of G figures you suggested for the UCD centre mounted tank set up... i've still not put this entirely to bed yet...anyway if and when i put this YS in the UCD, how much extra weight do you think i'm adding on here to support the YS's fuel system needs...pipework, filters, NRV's and tape round the tank,which in all fairness, i find a realy bizzar concept..stoppers poppig out,split tanks..fuel filled fuze's...im not sure i want the remotest chance of these problems.... regards Dave.