Very tricky to get lens off light to change bulb. Used a putty knife to pry up one edge then got a screwdriver in to get it all the way off.
To replace condenser drawer interlock I removed door and screws from left-hand hinge locations, then unscrewed four screws at bottom to pull out bottom of front panel. There is a galv. Metal piece that goes across the bottom and hinges on the catch mount - remember how that goes in for reassembly. Remove old catch and position new catch with arm to left then rotate ccw to get arm down, then insert catch into mount, reposition metal bar, and reassemble everything.