I am also that magical age, Graskie. My heart condition is called Brugada, it is all to do with the electrics of the ticker, and it is known as 'the sudden death syndrome'! I have been fortunate that although it is hereditary, it has not killed me off! Had to have an Implantable Cardioverter Defibrillator fitted 6 mths ago in Harefield Hospital so if the heart does go into flutter or fibrillation it will shock it back to normal. I am one of six siblings , trust me to get the problem (but then I have lost. 3 brothers at very early ages to cancer). So I use model railways, and Hornby in particular, as a form of therapy. (That's what I tell my wife, anyway). My problems seem small compared to yours, if I feel a bit iffy, I sit and look at the forum..........