The first picture (above the bloody finger picture) looks like a lot of the structural integrity of the splash well and top cap has been cut away. 
   
 I saw where you had a plan to repair it: 
 "I'm hoping to do the structural glassing from the inside, since I have access to the inside of the cuts through hatches." 
  
 I'm repairing the transom of my latest project, a Glastron HPV-175, from the inside.  I've removed the gas tank and rotten wood and am basically laying on the floor of the boat working with outstretched arms and in cramped quarters. 
   
 Good luck on working thru the hatches on yours.
		 
		
		
		
		
		
		
			
				__________________ 
				1973 Mako 20' Center Console 
1984 Wellcraft V20 Cuddy 
1977 Wellcraft V20 Center Console 
1975 Wellcraft V17 Center Console 
1964 16' Super Skeeter with 55Lb thrust Motorguide Trolling Motor 
 
1985 Glastron HPV-175 - sold 
1984 Wellcraft 180 Fisherman - sold 
1973 Mako 17' Angler - sold 
1972 Mako 17' Standard - sold 
1972 Mako 19' Center Console - sold 
Always looking for the next one.
			 
		
		
		
		
		
	
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