LAST EDITED ON Dec-30-03 AT 07:24 AM (CDT) I have a Tom Lay ST 51 like you describe, I think.

It has a "squareish" head, not the old 51 that looks kinda like the 46. It performs flawlessly, with a ton of power and an outstamding
4-2 break. Mine is 10 years old, and still strong. It began it's "stunt life" in a 64 oz. SV-11 and is now in my USA-1.
I would recommend it to anyone! Tom really does excellent work on the Super Tigres.
I am not sure if Leonard does the ST's, but I know that Tom Dixon does. Also Randy Smith and Byron Barker. Might be others, but Tom Lay has a great reputation for Tigres.
Bill <><
Disclaimer: I am neither a NATS Champion, engine reworker, engine producer, column writer, Hobby Shop owner, *rockeet* scientist, nor otherwise. Just an old Advanced flier. 