23 hours ago, CaptainMorgan said:

And wouldnt believe any math based on fuel tank gauge - mine is often off by 1/4 tank or more

Ya my T220 tank was idling to the trailer at 2% gas and only took 39.5 gallons despite the 58 gallons capacity. I expect some safety/gas design past 0% given how the tanks slosh around, but not 18 gallons worth! 
 

we seem to be using 10 gallons each 75 min or so surf session fwiw, very rough approximation on a m6 t220

Welcome!  Two towers were available that year.  Depending on your budget, the brands listed here will get you started.  Are you looking for forks to go on the current swivels?  Uptice has some at a reasonable price. 
https://www.themalibucrew.com/index.php?/forums/topic/85296-illusion-x-tower-aftermarket-rack/

Also, many of those are eligible for a forum discount if you are a site supporter.  (And you can post pics of that new ride too). 

As long as the 100 octane is un leaded you shouldn't have issues doing that. But be aware a lot of it is leaded which will not be friendly to your cats. 

Fwiw.  I have a 12 year old vtx with the 350ss.  Finding or changing a fuel filter is not on the list of things I have done.

3 minutes ago, Btown801 said:

Headed to Powell, houseboat has 100gallons of 87 octane. LT4 needs minimum 91. Manual does not recommend octane boosters. I am contemplating taking gas cans full of 100octane to mix with the 87.  Am I wrong?

100 octane is going to be aircraft fuel, isn't it?  Not sure that 100LL is going to be good for your o2 sensors/cat.