That's it! I've got "installed" pics from a retired 235 spray-oiler block that I'll be bringing to the homecoming for machine work demonstrations, but my picture host isn't cooperating for some reason and I can't upload them. Drop me an email and I can send them directly to you if you like. Those screws appear to be #10, somewhat smaller than 1/4".
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!