Some information on the G class at Tralee from Andrew Waldron, after I asked a related question on the Industrial Railway Society group.
With relevance to John Langford's photos on Fenit Pier as reproduced in @jhb171achill's North Kerry book:
A ship load of timber was due that day for McGowan's merchants in Tralee, loaded into open wagons and taken over the branch to Tralee by a G class Dtz shunter. McGowan hired the second Tralee Dtz, the one in reserve to shunt the wagons at his site, while the first Dtz went back to Fenit, for the second load. The last shipping order was the one after this consignment in 1969, then the curtain came down.
I hadn't realised that Tralee had more than one G allocated, so I asked more about that, and Andrew responded:
G Class Dtz locos, allocated to Tralee in the period 1965 to 1970 were G 611, G 613, G 614 and G 617. McGowan hired 617 in 1967, again in 1968, he hired 613 in 1969. I will dig some photos out and send to you off group.
I'd already got my eyes on G611 after I found photos of that at Castleisland. Given that we also have photos of G602 and G616 at Fenit (outside the time period mentioned by Andrew) it seems that the majority of the Gs would have visited Fenit at one time or another.
I'm beginning to wonder if a G class chassis etch would be worth doing to modern standards, and maybe a G601 cab to fit the Worsley Works model?