A slight modification to a rubber expandable freeze plug makes it a good adapter for a master cylinder when going to a remote reservoir. Install a larger diameter carriage bolt to expand it, and drill and tap the bolt for a flexible fill hose from the reservoir.
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!