Ordered this chunk of aluminum off ebay, 2 days later i got it this evening so set to cutting it to shape i needed and shave some weight off.
Used my trusty Bosche sidewinder skill saw with a marathon thin kerf 40t blade, safety glasses, ear plugs and got to cutting. I purposely left saw cut side up on chunks i removed and you can see it cut full depth thru 1 3/4" aluminum no problem and very cleanly.
Will set up drill press tomorrow to drill the 6 bolt holes and im going to have to drill some lightening holes as well. Chunk started off 37lbs, shape i made cut off 13lbs for a total of 24lbs….alot of weight hanging off rear of boat so want to drop more weight without compromising strength….but overall its a lifetime fix vs worrying about wood degrading again