Question #1: What is the thickness of a standard production LPL Carrier, NOT including the indexing bars on the underside of the carrier?
A: 4.2mm glassless, 6.6 double glass 4x4 (includes index - which is 1.1mm)

Question #2: What is the thickness of indexing bars on the underside of the carrier?
A: 2mm

Question #3: What is the maximum clearance between the baseplate and the lamphouse? This may not be so easy to measure accurately.
A: with the lever up approx 7.3mm. with the negative stage plate removed 13.5mm. With masking negative stage plate ??

Question #4: Do all LPL's have the same clearance?
A: Sorry I only have the one model....