Sorry for your loss Sapper I experienced something along those lines with my father who had pancreatic cancer the most painful of all of them it took 12 months for dad who when he passed weighed only 40 kilogrammes.
Just try to remember the good times Sapper my brother and I always had spirited talks on most wars he wanted to go to VN to be a door gunner but the RAAF kept him at what he did best I suppose repair jet engines.
Remember them for who they were and not how they ended up.