Ah - good point about the elbow (impact) events being separate (and demonstrated). I'd been thinking about the valve closing being the 'event' and wasn't sure what limit on 'events' there might be. (Not, apparently, good.)

Yes, that's what we're getting ready to do - push a transient hydraulic analysis on thru CAESAR. Relatively simple side first - pump, check valve, two actuated valves....I'll build it up slowly, adding one 'item' at a time.

Thanks.