Tacking down the CrossPlate
In order to keep the Crossplate from shifting slightly during initial appliation of the Thermal-Acrylic Putty, tack it down in advance with one heated Thermal-Acylic Bead (TAB).
Submerge one TAB into recently boiled water and allow to turn clear.
Place the clear TAB on the anterior internal side of the Lower Tray:
Position the CrossPlate into it's receiving slots of the Lower Tray and press firmly:
View through the external side and allow the TAB to cool (it turns white again) before proceding with applying Thermal-Acylic Putty and adapting to the mandibular model.