I have two LEO .37s. I am told they are really .34. (??) But, nevertheless, I have used one and it is pretty strong, and runs a fantastic 4-2! Don't have a clue if they are stock or not. Bought them new from Big Country Joe, and Scott Riese put the venturis, etc., on them. I rate it with the Magnum XL square head but with a 4-2, not the wet 2. It hauled a porky RD-1 with authority!
BTW: Nice looking ship there, Warren!