Verified on a 5x10
Crane 309
Mosconi 309
Greenleaf 289
Cranfields runs are not verified but given his skill as fun player he certainly was capable of the 400 + runs.
If I remember, the old 10 footers at Bensinger’s played fairly easy. Likely why Ralph G. favored the side pocket break, as 10’ was standard in his heyday.