I am still working out the baseplate warp correction procedure for aging B795 linatrack TTs with the composite baseplate, the most current proposed procedure;
The disconnected and removed deck resting on a suitable box on a table with carpenters level across the baseplate deck with the platter off, the gantry in, to start. The 12-pack box for ramen noodles is just the right size and higth to do the set-up, an additional small spirit level is also required. Use the carpenter's level to determine/set the baseline leveling 'standard' on the baseplate for the other leveling adjustments, make and check the leveling adjustments with the smaller level. The motor must be re-leveled first using the available spacer washers and additional washers if required to raise the motor to provide clearance for the re leveled platter in the baseplate platter well. The motor plate leveling can be checked on the rotor during the process. This adjustment may need tweaking later as the platter higth and leveling adjustment relative to the gantry leveling adjustment will be interactive. The motor plate should be remounted so that it doesn't rock on the spacer washers before being firmed down with the mounting screws. For that reason I wouldn't advise using wave spring washers here to provide fine adjustments, the plate must be spaced with hard washers to avoid stress-flexing the motor plate and possibly affecting the hall device flux screw adjustments re the rotor magnet. I think wave washers can be used under the gantry pillar plate to provide adjustment without shuffling spacers, use 3, perhaps with a thin brass washer against the baseplate. The gantry twist if any should first be neutralized by loosening the two rail screws and using the small level to make both rails the same before re-tightening the screws. Make sure the gantry cover fits afterward as the end piece can slide inward during the adjustment.
Now the fine leveling and spacing adjustments can be made, the goal is to get the relative tilt and leveling of the platter and gantry such that the platter and gantry rails are exactly parallel with each other as per spirit level comparison, then ensure that the the adjustments put the top of rails 41mm from the platter surface
at both ends of the rails. Relative lateral tilt of gantry and platter will set the distance, tweaking both will level that distance and spring wave washers under the gantry pillar plate should aid the process. There may be a bit of baseplate gravity sag on the suspension springs when the composite baseplate assembly is returned to the base suspension for playing, err toward compensating upward for this when doing the parallelism adjustments if it's a matter of a little upward/downward relative tilt of the gantry vs the platter. Be advised that small changes with the inside lateral gantry mounting screw will give relatively large changes, the two outside screws the same for lateral but less so for fore-aft relative tilt to the platter, while less critical should still be as close to correct as possible. Fore-aft gantry leveling can be checked against the platter with a spirit level on the right-side gantry end plate. Round-robin tweak all until service manual standards are re-established re parallelism and 41mm gantry rail-to-platter spacing. A note about this 41mm spacing, it is the factory 'standard' for making the cartridge spacing adjustments. If a single cartridge or 'P'mount is to be used by a knowledgeable owner, then this 41mm spacing can be 'fudged' to suit the the cart or cart plus adapter for use without cart spacers since it's the cartridge's higth that is being accommodated by the additional spacers. This is how I did my set-up for 'P' mount with no spacers. Here is the desired result in any case, pic courtesy of boyerd IIRC.
Lastly, check and if required reset radial tracking adjustment with the pillar stop eccentric as per the manual, recheck tracking force. Re-level the baseplate suspension to level the platter.
Reassemble and enjoy your correctly aligned B795.
Mine came back as close to 'on-the-money' for the 'P' mount Digitrac cart as one could reasonably expect just by reshuffling the available motor plate and gantry base spacer washers with no additionals required, good news for a favorable outcome for owner-users of this popular version.
