A three dimensional printing system comprising: a support plate including a ridge surrounding a first central opening ; a resin vessel including: a vessel body having an inner edge surrounding a second central opening including a pair of latch features and one or more mechanical features including an interface mechanism coupled to a pair of latches configured to engage the pair of latch features to vertically secure the resin vessel relative to the support plate ; and a transparent sheet that closes the second central opening to define a lower bound for a body of resin to be contained in the resin vessel ; and the one or more mechanical features being configured to align and secure the resin vessel relative to the support plate whereby the ridge engages a lower surface of the transparent sheet to thereby tension the transparent sheet and whereby the ridge is laterally recessed inwardly relative to the inner edge of the vessel body ; and a controller coupled to the interface mechanism ; wherein the latches exert a downward force upon the latch features ; and wherein the controller programmably controls the downward force of the latches on the latch features whereby the tension in the transparent sheet is programmably controllable; and wherein the support plate has an upper surface, the engagement of the ridge and the transparent sheet prevent the vessel body from bottoming out against the upper surface of the support plate whereby the downward force of the latches on the latch features increases the tension in the transparent sheet . a support plate including a ridge surrounding a first central opening ; a resin vessel including: a vessel body having an inner edge surrounding a second central opening including a pair of latch features and one or more mechanical features including an interface mechanism coupled to a pair of latches configured to engage the pair of latch features to vertically secure the resin vessel relative to the support plate ; and a transparent sheet that closes the second central opening to define a lower bound for a body of resin to be contained in the resin vessel ; and the one or more mechanical features being configured to align and secure the resin vessel relative to the support plate whereby the ridge engages a lower surface of the transparent sheet to thereby tension the transparent sheet and whereby the ridge is laterally recessed inwardly relative to the inner edge of the vessel body ; and a vessel body having an inner edge surrounding a second central opening including a pair of latch features and one or more mechanical features including an interface mechanism coupled to a pair of latches configured to engage the pair of latch features to vertically secure the resin vessel relative to the support plate ; and a transparent sheet that closes the second central opening to define a lower bound for a body of resin to be contained in the resin vessel ; and the one or more mechanical features being configured to align and secure the resin vessel relative to the support plate whereby the ridge engages a lower surface of the transparent sheet to thereby tension the transparent sheet and whereby the ridge is laterally recessed inwardly relative to the inner edge of the vessel body ; and a controller coupled to the interface mechanism ; wherein the latches exert a downward force upon the latch features ; and wherein the controller programmably controls the downward force of the latches on the latch features whereby the tension in the transparent sheet is programmably controllable; and wherein the support plate has an upper surface, the engagement of the ridge and the transparent sheet prevent the vessel body from bottoming out against the upper surface of the support plate whereby the downward force of the latches on the latch features increases the tension in the transparent sheet . <EOS>