First iteration scalable concept w/ pegs to secure lid on to. Flat machined into side for mounting-this feature was inadequate.

First concept of saparable motor housing unit, on motor specifics were known at this time.

Second iteration housing with tabs for bolts to secure lid with. Housing is still round with cut-out for press fit mounting plate.

First model with spaced flats for attaching clasps to secure lid with.

First ineration non-scalable housing design with clasps holding sealing surface together.

First concept of saparable motor housing unit w/ full mating flange.

Unit developed for DDR, with fins and foreward mounting surface.