As the keel band was heavily rusted, it needs to be replaced at sometime so why not now as i have the ballast out. It was bedded in with denso tape and as horrible as it is to work with it works!. In the vicinity of the through-hole bolts the denso was still tacky. The bands were in roughly 4 foot sections, but definitely the keel band needs to be replaced as can be seen below. I will replace with Stainless Steel reusing the existing holes. I will not use denso, but opt for Sikaflex or 3M 5200 [plenty of it] and use stainless as a backing for the through-hole bolts again bedded in Sikaflex of 3M. The bob stay fitting I will have re-fabricated in Stainless to the same size.