""I've heard that stainless against aluminium is the worst possible combination.....?""
http://www.zygology.com/productcart/pc/Galvanic-Corrosion-Chart.htmlThe further a metal is apart on the cathodic table the greater the measures needed to prevent electrolysis.
Stainless and aluminium are not good friends but as you will have noted on Morgans there is a physical barrier in place where bulkhead and inner wings (s/s) meet the aluminium for this very reason.
