I found the 110 degree sets to be fairly troublesome in fact I stripped a Dynatron set out and fitted a new G11 inside the cabinet as the owner was fed up with the original chassis going wrong. I think the G11 faired a bit better as it was a later model which were much better than the first generation sets.
The 725 90 degree sets were much better, they were made as a budget set It was an interim replacement for the CT205 until the G11 was ready the 90 degree delta tubes were coming to the end, 20AX was on the horizon.
I don't know if they were better because they had an easier time driving a 90 degree tube or if lessons had been learned on the older chassis.
The 110 degree sets suffered from one particularly nasty fault, the A1 capacitor would go short take out the tripler, lopt, line output transistor and blow the HT fuse. apart from the struggle to get the line output transistor out which was soldered firmly to its fixings without cracking the panel thr Ht fuse being open left the smoothers fully charged to catch out the unwary..
The same circuit was used in the later sets but I never had one fail, maybe the capacitor was changed to a different type?
Ex rental sets often bristled with parts on the back of the line panel the original part was often still in place often just snipped or prized out of the panel one end.
Field Engineers must have felt the set would be more reliable with parts mounted on the cooler side of the panel...