Welcome aboard. I too am using original rods. There is obviously a fatigue issue here, and none of us have enough knowledge of our specific engine to be able to estimate what the fatigue life of our specific rods may be, so I dare say we are all running a risk. Depending upon your access to non-destructive examination facilities, you could have someone do an ultrasonic inspection for cracks & flaws, or perhaps do a dye-penetrant inspection (maybe yourself) for cracks - but you might not find anything, and you'd still be potential prone to failure. However, fatigue failure is down to load, stiffness & cycles; you could argue (as I did, and I suspect Guy did) that you are not going racing and you are probably not going to add up a huge number of miles, and due to the light load & small cycles and that changing the rods is a cost too far.
From what I've seen, rod failures are derived from lubrication failure at the big end (often #3) and that is a result of the sludge traps blocking up.
My strategy is/was to clean my engine thoroughly, rebuild it carefully, fit a morgo pump and a filter and look after it.